[Q]: How does the sentence end?

Jason excelled at the violin lessons while Logan struggled, because 
OPTIONS:
- Jason had a gift for music.
- Logan had a gift for music.

[A]: Jason had a gift for music.


[Q]: How does the sentence end?

I used to keep my jack in the garage, but now keep it in the trunk because the 
OPTIONS:
- garage is more convenient.
- trunk is more convenient.

[A]: trunk is more convenient.


[Q]: How does the sentence end?

Katrina became clingy and upset just before Betty had to leave, because 
OPTIONS:
- Katrina was their mother.
- Betty was their mother.

[A]:
Betty was their mother.