[Q]: How does the sentence end?

I was finely chopping the onions with a chef's knife and not the cleaver because the 
OPTIONS:
- knife was unwieldy.
- cleaver was unwieldy.

[A]: cleaver was unwieldy.
QUES: Continue writing.

We always played in the field next to my house and not the park, because the 

OPTIONS:
- field was rarely maintained.
- park was rarely maintained.
+++++++++
ANS: park was rarely maintained.
Problem: How does the sentence end?

Adam put gum in Steven's hair, because 
OPTIONS:
- Adam was the sort of person to be bullied all the time.
- Steven was the sort of person to be bullied all the time.
Answer: Steven was the sort of person to be bullied all the time.
sentence: The products didn't work for Carrie, but they did for Angela because  OPTIONS:
- Carrie thought they were the right size.
- Angela thought they were the right size.
complete: Angela thought they were the right size.
Justin always played funny jokes on Leslie at high school because 
OPTIONS:
- Justin was a prankster.
- Leslie was a prankster.
Justin was a prankster.
Problem: Continue the following story.

Singh drank a soda with caffeine to combat his tiredness but it didn't work because the 
OPTIONS:
- tiredness was too weak.
- caffeine was too weak.
Here's how I want to continue it:
caffeine was too weak.