[Q]: How does the sentence end?

He used feathers to make the bedding instead of cotton balls, because the 
OPTIONS:
- cotton balls were sparse.
- feathers were sparse.

[A]: cotton balls were sparse.
QUES: Continue writing.

In order to control his child's temper, the father choose the reward over the punishment because he thought the 

OPTIONS:
- reward would be more subtle.
- punishment would be more subtle.
+++++++++
ANS: reward would be more subtle.
Problem: How does the sentence end?

Felicia pulled ahead of Rachel while swimming because 
OPTIONS:
- Felicia was swimming slower than everyone else.
- Rachel was swimming slower than everyone else.
Answer: Rachel was swimming slower than everyone else.
sentence: James used a wet towel to scrub the floor and got it clean. The  OPTIONS:
- floor was dry before.
- towel was dry before.
complete: floor was dry before.
Brett was more prepared to be a parent than Aaron because 
OPTIONS:
- Brett had spent very little time with children.
- Aaron had spent very little time with children.
Aaron had spent very little time with children.
Problem: Continue the following story.

Michael was very good at using Excel but Justin was not. 
OPTIONS:
- Michael made a lousy spreadsheet for the project.
- Justin made a lousy spreadsheet for the project.
Here's how I want to continue it:
Justin made a lousy spreadsheet for the project.