[Q]: How does the sentence end?

A lot of people prefer Android to Apple operating systems because the 

[A]: Android OS is cheaper.


[Q]: How does the sentence end?

Katrina is a client of Rebecca at the salon and 

[A]: Katrina is grateful for the work that they perform.


[Q]: How does the sentence end?

Victoria dyed the hair of Jennifer a bright red, and 

[A]:
Jennifer thanked them for doing such a great job.