Problem: How does the sentence end?

Ann was contemplating on buying the desk made out of mirror or wood, but the 
OPTIONS:
- mirror was fragile.
- wood was fragile.
Answer: mirror was fragile.

Problem: How does the sentence end?

Katrina apologized to Betty for getting a big food stain on the couch, because 
OPTIONS:
- Katrina felt awful about it.
- Betty felt awful about it.
Answer: Katrina felt awful about it.

Problem: How does the sentence end?

Because Elena was dissatisfied with the service at the restaurant while Betty was happy, 
OPTIONS:
- Elena left a large tip.
- Betty left a large tip.
Answer: Betty left a large tip.

Problem: How does the sentence end?

Kayla had to shave their legs more frequently than Elena, because 
OPTIONS:
- Kayla had faster growing body hair.
- Elena had faster growing body hair.
Answer:
Kayla had faster growing body hair.