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.

[EX Q]: He could either build the birdhouse or the tree-house first, but the _ would take less time to construct.
[EX A]: birdhouse

[EX Q]: The egg from the farm tasted better than the milk from the store, because the _ was old.
[EX A]: milk

[EX Q]: The kitty didn't fit into the litter box that we bought for her because the _ is too small.
[EX A]:
box