[Q]: How does the sentence end?

The blades worked a lot better than the razors from the shop because the

[A]: razors were dull.

[Q]: How does the sentence end?

There were more spiders in the cabin than in the house because the

[A]: cabin was dirtier.

[Q]: How does the sentence end?

Hunter was the smartest person in college while Craig barely passed the year,

[A]:
Craig was at the bottom of the list for best students.