[Q]: How does the sentence end?

Jan saw dolphins up close but not whales on her harbor cruise, because the 
OPTIONS:
- dolphins stayed away from the ship.
- whales stayed away from the ship.

[A]: whales stayed away from the ship.
QUES: Continue writing.

Cynthia would vote for Emily in the election because 

OPTIONS:
- Cynthia had been convincing with her policy positions.
- Emily had been convincing with her policy positions.
+++++++++
ANS: Emily had been convincing with her policy positions.
Problem: How does the sentence end?

The teeth of Katrina are more yellow than Laura's due to 
OPTIONS:
- Katrina drinking mostly coffee all the time.
- Laura drinking mostly coffee all the time.
Answer: Katrina drinking mostly coffee all the time.
sentence: It is easier to install the faucet than the toilet in the bathroom because the  OPTIONS:
- toilet has more parts.
- faucet has more parts.
complete: toilet has more parts.
Pam liked reading the fiction book more than reading the magazine because the 
OPTIONS:
- magazine was far more interesting.
- book was far more interesting.
book was far more interesting.
Problem: Continue the following story.

The carpool was a less beneficial way to get my son to school than driving my car because with the 
OPTIONS:
- carpool you never have to wait on others.
- car you never have to wait on others.
Here's how I want to continue it:
car you never have to wait on others.