[Q]: How does the sentence end?

Nelson got good grades in graduate school, unlike Nick because

[A]: Nick was lazy during the tests.

[Q]: How does the sentence end?

Aaron spent more time with their pet than Ryan because

[A]: Aaron was at home all day.

[Q]: How does the sentence end?

The children needed to make their backyard hideout out of wood and not metal because the

[A]:
metal was unavailable.