[Q]: How does the sentence end?

The dog became calmer when he had bones to chew on, though other treats amped him up. The 
OPTIONS:
- bones were stress-inducing.
- other treats were stress-inducing.

[A]: other treats were stress-inducing.
QUES: Continue writing.

Sarah did not recognize Samantha in her costume at first, but then 

OPTIONS:
- Sarah began to speak.
- Samantha began to speak.
+++++++++
ANS: Samantha began to speak.
Problem: How does the sentence end?

Jason wanted to go on a safari and proposed Derrick come with him but he refused. 
OPTIONS:
- Jason greatly valued adventure.
- Derrick greatly valued adventure.
Answer: Jason greatly valued adventure.
sentence: The brokerage collapsed quickly but the bank remained solvent, because the  OPTIONS:
- brokerage was mired in debt.
- bank was mired in debt.
complete: brokerage was mired in debt.
Rachel asked Betty if she had ever applied for a bank loan, because 
OPTIONS:
- Rachel couldn't remember.
- Betty couldn't remember.
Rachel couldn't remember.
Problem: Continue the following story.

Before traveling, John checked the brakes in the car, but didn't need to check the belts, because the 
OPTIONS:
- brakes had been running well.
- belts had been running well.
Here's how I want to continue it:
belts had been running well.