[Q]: How does the sentence end?

Christopher got to the store faster than Donald because

[A]: Christopher rode on a horse instead of walking.

[Q]: How does the sentence end?

Kenneth asked Kyle what time the reality show came on because

[A]: Kenneth had a bad memory.

[Q]: How does the sentence end?

Katrina wants someone to perform a CPR on her baby so she asks Sarah for help, because

[A]:
Katrina can't do it herself.