[Q]: How does the sentence end?

Katrina's challenges at school included math and science, while Kayla's were reading and literature.  

[A]: Kayla was definitely better at literary subjects.


[Q]: How does the sentence end?

Angela was able to buy property in Dubai and Rachel was not because 

[A]: Rachel was very poor.


[Q]: How does the sentence end?

Amy was good at dancing while Elena was not very good at it because 

[A]:
Amy had great rhythm.