[Q]: How does the sentence end?

The car sailed over the bridge but crashed into the road ahead, since the

[A]: bridge was so low for the jump.

[Q]: How does the sentence end?

Christine caught the cold at school, but Felicia stayed healthy, because

[A]: Christine had a weak immune system.

[Q]: How does the sentence end?

So

[A]:
Amy went to the hospital because Amy was sick while Mary was actually getting better.