[Q]: How does the sentence end?

Bob renewed his expired license for a new gun license. Because the 
OPTIONS:
- expired license was legal.
- gun license was legal.

[A]: gun license was legal.
QUES: Continue writing.

Christine praised Carrie about their abs, because 

OPTIONS:
- Christine had been working out more in the gym.
- Carrie had been working out more in the gym.
+++++++++
ANS: Carrie had been working out more in the gym.
Problem: How does the sentence end?

Nick received the paint from Dennis to complete the project because 
OPTIONS:
- Nick was a better painter than him.
- Dennis was a better painter than him.
Answer: Nick was a better painter than him.
sentence: Christine swam faster than Maria in the water because  OPTIONS:
- Christine has a really weak body.
- Maria has a really weak body.
complete: Maria has a really weak body.
Monica wanted help from Carrie in preparing the saffron potatoes, because 
OPTIONS:
- Monica was tired of doing all the work.
- Carrie was tired of doing all the work.
Monica was tired of doing all the work.
Problem: Continue the following story.

Christopher had a grumbling stomach but not Nelson because 
OPTIONS:
- Christopher had had waited a shortened time for lunch.
- Nelson had had waited a shortened time for lunch.
Here's how I want to continue it:
Nelson had had waited a shortened time for lunch.