**Rule: Understanding Idiomatic Expressions.** The idiom 'ring true' means to seem authentic and truthful. The sentence uses the negative ('does not ring true') to mean that the claim seems false, especially when contrasted with 'reality'. Option (a) is the correct definition. Option (b) is a literal misinterpretation. Option (c) is the opposite. Option (d) is about popularity, not truthfulness.

**Rule: Understanding Idiomatic Expressions.** The idiom 'on pins and needles' describes a state of being very anxious or nervous about something that is going to happen. Waiting for important results is a classic cause of this feeling. Option (c) is the correct definition. Option (a) and (d) are literal misinterpretations. Option (b) is the opposite.

**Rule: Understanding Idiomatic Expressions.** The idiom 'a fly on the wall' refers to a person who is able to observe a situation without being noticed. This allows them to see and hear things they otherwise would not. Option (b) is the correct definition. Option (a) is the literal meaning. Option (c) is the opposite of being unperceived. Option (d) is a different status.

**Rule: Understanding Idiomatic Expressions.** The idiom 'get down to brass tacks' means to begin considering the fundamental, practical details of a matter. Discussing the 'actual cost' is moving from generalities to specifics. Option (a) is the correct definition. Option (b) is a literal misinterpretation. Options (c) and (d) are the opposite of the idiom's meaning.

**Rule: Understanding Idiomatic Expressions.** The British idiom 'go spare' means to become very angry or upset. Discovering a mistake in a report could easily provoke such a reaction from a boss. Option (a) is the correct definition. Option (b) and (d) are the opposite reactions. Option (c) is a literal misinterpretation.

**Rule: Understanding Idiomatic Expressions.** The idiom 'a man of his word' (or 'a woman of her word') describes a person who is reliable and can be counted on to do what they promise. The sentence structure itself provides a clear definition. Option (b) is the correct meaning. Option (a) is a different trait. Option (c) is the opposite. Option (d) is an incorrect interpretation of 'word'.

**Rule: Understanding Idiomatic Expressions.** The idiom 'bury the hatchet' means to stop fighting or arguing and establish friendly relations. Working on a 'trade agreement' is a sign of peaceful cooperation between countries. Option (c) is the correct definition. Option (a) is a literal interpretation. Options (b) and (d) are the opposite.

**Rule: Understanding Idiomatic Expressions.** The idiom 'get more than one bargained for' means to get something different and usually more negative or difficult than what one expected from a situation. Coaching children can often be more challenging than it first appears. Option (b) is the correct definition. Option (a) is a positive outcome, which is not the usual implication of this idiom. Option (c) is incorrect. Option (d) is a literal misinterpretation.

**Rule: Understanding Idiomatic Expressions.** The idiom 'out of sorts' means to be in a bad mood or to feel slightly ill. The inability to concentrate is a common symptom of feeling this way. Option (a) is the correct definition. Option (b) and (d) are literal misinterpretations of 'sorts'. Option (c) is the opposite.

**Rule: Understanding Idiomatic Expressions.** The idiom 'pull the plug' means to terminate or stop something from continuing. A project going over budget is a common reason for its cancellation. Option (c) is the correct definition. Option (a) is the literal action from which the idiom is derived. Options (b) and (d) are the opposite.