[Q]: How does the sentence end?

Kayla wanted to have a relationship with Elena for some time, but

[A]: Elena didn't want to date.

[Q]: How does the sentence end?

Carrie needed to be vigilant about her bone health which Natalie worries about since

[A]: Carrie is elderly.

[Q]: How does the sentence end?

The criminal ran away from Emily but not Jennifer because

[A]:
Jennifer was trying to save him.