You need to answer a given question containing a blank (_). Your answer must be one of the two objects mentioned in the question, for example "trophy" and "suitcase". Your answer must not contain a word that is not present in the question. Please don't use articles (e.g., the, a) before the answer.

Q: Sara had a hard time deciding if her new shoes would go better with a dress than with pants, but finally decided on the _ because they had high heels.

A: dress
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Q: The car engine outperformed the bus engine simply because the _ was inefficient during the test run.

A: bus
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Q: The woman used an exercise ball after having abdominal surgery because the _ weakened her core muscles.

A:
surgery
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