[Q]: How does the sentence end?

The lab was excited about the new medication that had tested on a rat with an illness because the 

[A]: medication is working.


[Q]: How does the sentence end?

Because Angela was allergic to flowers and Amy was not, 

[A]: Amy loved having flowers in the house because she thought they were pretty.


[Q]: How does the sentence end?

Joel decided to end the relationship with their cable provider but Eric did not because 

[A]:
Eric thought they were being undercharged.