Problem: How does the sentence end?

The minefield had a bomb in it, that the boys were walking thru. The 
Answer: bomb went off in the minefield and hurt the boys.

Problem: How does the sentence end?

The face of Dennis has more acne than Aaron's does. That's because 
Answer: Aaron uses an appropriate face wash.

Problem: How does the sentence end?

The toner has had more of an impact on Claire's skin than the cream due to the 
Answer: cream being weaker.

Problem: How does the sentence end?

At the grocery store, Chris asked for paper instead of plastic because the 
Answer:
plastic is worse for the environment.