[Q]: How does the sentence end?

Kenneth walked under the ladder while Joel went around it, since 
OPTIONS:
- Kenneth did not believe in superstitions .
- Joel did not believe in superstitions .

[A]: Kenneth did not believe in superstitions .
QUES: Continue writing.

William was shy and had trouble with having a good conversation with Kevin, because 

OPTIONS:
- William was timid.
- Kevin was timid.
+++++++++
ANS: William was timid.
Problem: How does the sentence end?

Tanya could calculate the market value on the house but Amy could not because 
OPTIONS:
- Tanya was a child.
- Amy was a child.
Answer: Amy was a child.
sentence: Betty always wasted money while Rebecca maintained a budget, so  OPTIONS:
- Betty always bought needless things.
- Rebecca always bought needless things.
complete: Betty always bought needless things.
Eric wanted to ascend to political power and Jason did not because 
OPTIONS:
- Eric was very ambitious.
- Jason was very ambitious.
Eric was very ambitious.
Problem: Continue the following story.

Lindsey was always happy while Betty was always grumpy at school, so 
OPTIONS:
- Lindsey had fewer friends.
- Betty had fewer friends.
Here's how I want to continue it:
Betty had fewer friends.