[Q]: How does the sentence end?

At the mall on Friday, Laura paid Jennifer for the diamonds because 

[A]: Laura was the customer.


[Q]: How does the sentence end?

Amy was a seamstress and Cynthia needed her curtains hemmed so, 

[A]: Amy charged to hem them.


[Q]: How does the sentence end?

I put my class notes in my book bag and misplaced it so I got an unforgettable backpack because the 

[A]:
book bag was plain.