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: She wondered if the schedules or the classes would lead to the most discipline, but the _ had the most effect.

A: classes
****
Q: To clean my floors I use a broom and sometimes also use a mop, since I want to be thorough today I am using the _ on the floor.

A: mop
****
Q: On a hot summer day, I turned on the air conditioner in the room because the _ was cold.

A:
air conditioner
****