Problem: How does the sentence end?

So 
OPTIONS:
- Justin wanted to be a bad person because Justin was taught to be good while Eric wasn't.
- Eric wanted to be a bad person because Justin was taught to be good while Eric wasn't.
Answer: Eric wanted to be a bad person because Justin was taught to be good while Eric wasn't.

Problem: How does the sentence end?

Sandra uses a whisk to beat the scrambled eggs instead of an electric beater, because the 
OPTIONS:
- whisk left lumps in the eggs yesterday.
- beater left lumps in the eggs yesterday.
Answer: beater left lumps in the eggs yesterday.

Problem: How does the sentence end?

Most authors published a book about romance rather than fantasy because the 
OPTIONS:
- romance novels sold poorly.
- fantasy novels sold poorly.
Answer: fantasy novels sold poorly.

Problem: How does the sentence end?

Matthew refused to cut the firewood like Donald asked even though 
OPTIONS:
- Matthew was too busy to do it.
- Donald was too busy to do it.
Answer:
Donald was too busy to do it.