Problem: How does the sentence end?

Jennifer was constantly cleaning up after Kayla because 
Answer: Jennifer was concerned with keeping things sanitary .

Problem: How does the sentence end?

Felicia always went to the building across the street unlike Emily, because 
Answer: Emily lived farther from it.

Problem: How does the sentence end?

Christine was able to lose more weight than Laura because 
Answer: Laura ate a lot of junk food.

Problem: How does the sentence end?

Carrie thought Samantha was a horrible driver because 
Answer:
Samantha caused the multi-car pileup on the freeway.