[Q]: How does the sentence end?

I had much less fun at the celebration than at the festival, because the 

[A]: festival was amazing.


[Q]: How does the sentence end?

It was easy to see that Erin but not Sarah was a good waitress because 

[A]: Sarah received a few tips just once a week.


[Q]: How does the sentence end?

Lawrence developed carpal tunnel syndrome at a faster rate than Ian did because 

[A]:
Ian didn't use the computer a lot.