[Q]: How does the sentence end?

Sarah had to annotate a novel but not Lindsey because 

[A]: Lindsey was taking a boxing class.


[Q]: How does the sentence end?

Brian got a job working with dogs, while Derrick worked in sales because 

[A]: Brian was an animal person.


[Q]: How does the sentence end?

Dennis was sympathetic to those who want to commit suicide but not Justin. 

[A]:
Justin felt anger and annoyance.