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]: Michael can't eat cheese, but he eats a whole lot of yogurt for breakfast. The _ bothers his stomach.
[A]: cheese


[Q]: Bill got a new king sized mattress but had to throw out his old queen bed frame because the _ was larger.
[A]: mattress


[Q]: The collision on the bumper destroyed the hood ,but the chassis was still intact, since _ was effective in an accident.
[A]:
chassis