[Q]: How does the sentence end?

The man cut the nail of the dog, but not its hair, so the
OPTIONS:
- nail must have been long.
- hair must have been long.

[A]: nail must have been long.

[Q]: How does the sentence end?

The dog wagged it's tail at Monica but not at Jennifer, because
OPTIONS:
- Monica had played with it before.
- Jennifer had played with it before.

[A]: Monica had played with it before.

[Q]: How does the sentence end?

Ben needed to work on the sculpture and food, but he did the
OPTIONS:
- food first because he was hungry.
- sculpture first because he was hungry.

[A]:
food first because he was hungry.