[Q]: How does the sentence end?

Derrick studied very hard in grad school but Hunter didn't, so

[A]: Hunter failed their exams with low marks.

[Q]: How does the sentence end?

The puppy ignored Steven but was affectionate with Ian , since

[A]: Ian was its owner.

[Q]: How does the sentence end?

Randy has to let their hair dye process longer than Steven because

[A]:
Randy has a lot of gray hair.