[Q]: How does the sentence end?

William helped Christopher install the program on the computer because 

[A]: Christopher was inept with computers.


[Q]: How does the sentence end?

Ending a relationship was easy for Jessica but not Tanya because 

[A]: Tanya was more reserved.


[Q]: How does the sentence end?

Robert was teaching the students the right way unlike Derrick because 

[A]:
Derrick thought it was quicker.