[Q]: How does the sentence end?

His muscles got a lot bigger from using the powders than from using the vitamins, because the 

[A]: vitamins were useless.


[Q]: How does the sentence end?

I wish that I had enough money to buy a new house, but I don't because the 

[A]: house is too expensive.


[Q]: How does the sentence end?

Jeffrey was unable to buy the expensive kit for his car, unlike Christopher, because 

[A]:
Jeffrey was poor.