[Q]: How does the sentence end?

Mary had to clean their house less often than Sarah did because 
OPTIONS:
- Mary had a cat in their house.
- Sarah had a cat in their house.

[A]: Sarah had a cat in their house.


[Q]: How does the sentence end?

Learning to dance was something that came hard to Betty but posed no challenge to Rebecca because 
OPTIONS:
- Betty had a musical bone.
- Rebecca had a musical bone.

[A]: Rebecca had a musical bone.


[Q]: How does the sentence end?

The car sailed over the bridge but crashed into the road ahead, since the 
OPTIONS:
- bridge was so low for the jump.
- road was so low for the jump.

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