[Q]: How does the sentence end?

Christine helped Sarah to feed the goldfish because 

[A]: Sarah was going out of town.


[Q]: How does the sentence end?

We used the tank to store the water instead of the bucket because the 

[A]: tank was cleaner.


[Q]: How does the sentence end?

Michael's best friend Joel suffers from a scary type of diabetes, so 

[A]:
Joel needs as much help as possible.