IDIOMS — Choose the option that best expresses the meaning of the underlined expression in context. Sentence: 'His plan was so complicated that it FLOORED his listeners.'

Introduction / Context:
The verb “floor” in informal English can mean to stun or baffle someone so much that they metaphorically drop to the floor, unable to respond. When a presentation “floors” an audience, the reaction is not laughter or anger but confusion or amazement. This question targets your ability to select the closest sense in a professional or academic discussion.

Given Data / Assumptions:

• The plan presented was “so complicated.”
• The direct effect is on “listeners.”
• We need the best near-synonym for “floored” in this setting.

Concept / Approach:
Because the cause is complexity, the natural consequence is difficulty in comprehension. “Floored” therefore aligns with being puzzled, baffled, or nonplussed. It does not primarily mean entertained, angered, or motivated here. Always align the verb’s sense with the surrounding cause-and-effect cues in the sentence.

Step-by-Step Solution:
1) Link cause to effect: complexity → confusion.2) Recall idiomatic senses: “to floor” = to stun/baffle.3) Evaluate options for closest meaning to bafflement.4) Choose “puzzled.”

Verification / Alternative check:
Substitute: “His plan was so complicated that it puzzled his listeners.” The sentence remains coherent and accurately reflects the described reaction.

Why Other Options Are Wrong:
A) “entertained” implies amusement, not confusion.C) “annoyed” suggests irritation rather than bafflement.D) “encouraged” is the opposite of being mentally stalled.

Common Pitfalls:
Over-generalizing “floored” to excitement or humor. In academic or technical contexts, it typically signals that the audience could not follow the reasoning.

Final Answer:
puzzled