**Rule: Understanding Idiomatic Expressions.** The term 'game-changer' refers to a new development that completely alters the way a situation is perceived or handled. A piece of 'new evidence' can dramatically change the direction of a legal case. Option (b) is the correct definition. Option (a) and (d) are literal misinterpretations. Option (c) is the opposite.

**Rule: Understanding Idiomatic Expressions.** The idiom 'get up on the wrong side of the bed' means to wake up and begin the day in a bad mood. The phrase 'in a bad mood all day' is a direct explanation of the idiom's meaning. Option (a) is the correct definition. Option (b) is a literal misinterpretation. Option (c) is the opposite. Option (d) could be a cause, but it is not the meaning of the idiom itself.

**Rule: Understanding Idiomatic Expressions.** The idiom 'pull strings' means to use one's personal influence, often secretly, to gain an advantage. Getting admitted to a prestigious school can be very competitive, and sometimes people use their connections to help. Option (b) is the correct definition. Option (a) and (d) are literal misinterpretations. Option (c) is the opposite of using special influence.

**Rule: Understanding Idiomatic Expressions.** The idiom 'high and dry' means to be in a stranded or helpless position. A market crash can leave investors in a difficult financial situation with no easy way to recover their losses. Option (b) is the correct definition. Option (a) is a literal interpretation. Option (c) is the literal origin of the phrase (referring to ships). Option (d) is the opposite.

**Rule: Understanding Idiomatic Expressions.** The idiom 'at one's wits' end' means to be completely overwhelmed with a problem and to have run out of ideas on how to solve it. A difficult puzzle can easily lead to this state of frustration. Option (b) is the correct definition. Option (a) is the opposite. Option (c) and (d) are incorrect interpretations of 'wit'.

**Rule: Understanding Idiomatic Expressions.** The idiom 'hold water' is used to describe an argument or theory that is valid and stands up to scrutiny. The sentence uses the negative form ('doesn't hold water') to mean the argument is flawed and not credible, especially since it's 'based on incorrect data'. Option (a) is the correct definition. Option (b) is a literal interpretation. Option (c) is the opposite. Option (d) is an unrelated topic.

**Rule: Understanding Idiomatic Expressions.** The idiom 'a shot in the arm' refers to something that has a sudden, positive, and revitalizing effect, especially on morale. A sports victory is a common event that boosts a school's spirit. Option (c) is the correct definition. Option (a) is the literal origin. Option (b) is the opposite. Option (d) is an incorrect interpretation.

**Rule: Understanding Idiomatic Expressions.** The idiom 'the Midas touch' refers to the ability to make money easily or to be successful in every venture. It comes from the Greek myth of King Midas who was granted the power to turn everything he touched into gold. The fact that 'every business he starts becomes successful' defines this ability. Option (a) is the correct definition. Option (b) is the opposite. Options (c) and (d) are incorrect interpretations.

**Rule: Understanding Idiomatic Expressions.** The idiom 'lie low' means to deliberately avoid being noticed or talked about, often after doing something that has attracted negative attention. A scandal is a prime reason for a public figure to do this. Option (c) is the correct definition. Option (a) is a literal misinterpretation. Option (b) is the opposite. Option (d) is a play on words but incorrect.

**Rule: Understanding Idiomatic Expressions.** The idiom 'cut from the same cloth' is used to describe two or more people who are very alike in their nature, beliefs, or behavior. Even people from different groups can share fundamental similarities. Option (b) is the correct definition. Option (a) and (d) are literal misinterpretations. Option (c) is the opposite.