[Q]: How does the sentence end?

Because Christopher was in a relationship but Brett was single,

[A]: Christopher would never flirt with women at the bars.

[Q]: How does the sentence end?

Derrick wrote out a business plan to get a bank loan while Benjamin decided to just wing it.

[A]: Derrick was rewarded with loan.

[Q]: How does the sentence end?

Adam rarely reached their goals, while Brian excelled at everything they did, because

[A]:
Brian was more motivated.