[Q]: How does the sentence end?

Timmy bought his sister a camera for her Birthday, instead of the computer because the 

[A]: camera was more affordable.


[Q]: How does the sentence end?

Christine was warmer than Rachel was because 

[A]: Christine was sitting closer to the fire outside.


[Q]: How does the sentence end?

Because Lindsey generally preferred Android phones and Betty preferred Apple phones, 

[A]:
Betty owned an iPhone.