[Q]: How does the sentence end?

Brian had a hard time cutting the food but not Nelson because
OPTIONS:
- Brian had a dull knife.
- Nelson had a dull knife.

[A]: Brian had a dull knife.

[Q]: How does the sentence end?

Monica studied quite hard to learn Marathi but Angela didn't.
OPTIONS:
- Monica speaks Marathi very fluently.
- Angela speaks Marathi very fluently.

[A]: Monica speaks Marathi very fluently.

[Q]: How does the sentence end?

Joel is very fashion concious, Samuel is not which is why
OPTIONS:
- Joel doesn't wear fancy boots.
- Samuel doesn't wear fancy boots.

[A]:
Samuel doesn't wear fancy boots.