Problem: How does the sentence end?

Carrie signed up for an improv group while Christine did not, because 
OPTIONS:
- Carrie had always really enjoyed acting.
- Christine had always really enjoyed acting.
Answer: Carrie had always really enjoyed acting.
sentence: Mary did not understand computers but Betty was a computer nerd, so  OPTIONS:
- Mary was happy to fix it when it broke.
- Betty was happy to fix it when it broke.
complete: Betty was happy to fix it when it broke.
The family chose to ride the bus instead of the van to their destination because the 
OPTIONS:
- bus was cozy.
- van was cozy.
bus was cozy.
Input: Continue writing.

Craig was never going to be as good a dentist as Kyle  despite 
OPTIONS:
- Craig being fascinated by teeth.
- Kyle being fascinated by teeth.

Continued: Craig being fascinated by teeth.
Story needs to be completed:
Fred wanted to revamp his annual charity events theme to a new design. The 
OPTIONS:
- theme was new.
- design was new.

My choice:
design was new.
Problem: How does the sentence end?

Natalie took much longer to wash their hair than Sarah although 
OPTIONS:
- Natalie had longer hair.
- Sarah had longer hair.
Answer:
Sarah had longer hair.