[Q]: How does the sentence end?

Tanya asked Samantha to help their teenager with a math project because 

[A]: Tanya didn't understand it.


[Q]: How does the sentence end?

Before going on a date, I smelled my friend's breath and I suggested that they chew gum because the 

[A]: gum smelled good.


[Q]: How does the sentence end?

Their freshman year of college, Victoria lived in a dorm but Betty stayed at home with her parents because 

[A]:
Victoria lived outside of a commuting distance from the college.