[Q]: How does the sentence end?

Jessica gave her glass of red wine to Erin, because

[A]: Jessica preferred to stay sober.

[Q]: How does the sentence end?

She wanted to buy a designer handbag on an auction site but bought a knock-off watch instead because the

[A]: watch was inexpensive.

[Q]: How does the sentence end?

Derrick was much heavier than Justin, so

[A]:
Derrick needed to sit on more substantial furniture.