[Q]: How does the sentence end?

Angela wondered how Sarah had such a glossy, youthful face for her age because

[A]: Sarah was more beautiful.

[Q]: How does the sentence end?

Playing Battlefield for hours after school suited Lindsey but not Betty because

[A]: Betty disliked massive multiplayer online games.

[Q]: How does the sentence end?

Aaron showed Justin how to make a multiple layered cake for the birthday because

[A]:
Justin was an amateur baker.