[Q]: How does the sentence end?

Erin always had a steady stream of clients unlike Angela who only had a few clients because, as a professional,  

[A]: Angela was very ignorant of tax laws.


[Q]: How does the sentence end?

Kenneth installed the game for Brett although 

[A]: Brett was better at all things dealing with computers.


[Q]: How does the sentence end?

Aaron asked to borrow money from Steven because 

[A]:
Aaron forgot to bring their wallet with them.