[Q]: How does the sentence end?

Erin chopped the garlic while Rachel cooked the sauce, because

[A]: Rachel was a better cook.

[Q]: How does the sentence end?

Angela was more prone to infection than Rachel because

[A]: Rachel had stronger lungs since childhood.

[Q]: How does the sentence end?

Sarah pours the cement for Felicia's new driveway, so

[A]:
Felicia must be a home owner.