[Q]: How does the sentence end?

Katrina gave them vitamins everyday, and Elena took them, because 

[A]: Elena was a good child.


[Q]: How does the sentence end?

James could pick any more log from the wood and he decided to pick some fruits instead because the 

[A]: fruit is light.


[Q]: How does the sentence end?

Samuel took a taxi while Ian drove home because 

[A]:
Ian was sober enough to drive.