Problem: How does the sentence end?

Morgan wanted to remove the stain from her shirt, she poured vinegar from the bottle into the sprayer until the 
OPTIONS:
- bottle was empty.
- sprayer was empty.
Answer: bottle was empty.
sentence: Sarah got an A on the test while Kayla did not because  OPTIONS:
- Sarah remembered the teachers instructions to mail the test in unfolded in a larger envelope.
- Kayla remembered the teachers instructions to mail the test in unfolded in a larger envelope.
complete: Sarah remembered the teachers instructions to mail the test in unfolded in a larger envelope.
Maria ended up getting acid reflux after the meal, unlike Laura, because 
OPTIONS:
- Maria had ordered a spicy dish.
- Laura had ordered a spicy dish.
Maria had ordered a spicy dish.
Input: Continue writing.

The car was quick when it used electricity instead of gasoline, because it was made to run on the 
OPTIONS:
- gasoline more efficiently.
- electricity more efficiently.

Continued: electricity more efficiently.
Story needs to be completed:
There is less cholesterol in cod than in salmon because the 
OPTIONS:
- salmon is high in saturated fat.
- cod is high in saturated fat.

My choice:
salmon is high in saturated fat.
Problem: How does the sentence end?

Chicken was a staple in the diet of Leslie and not Nick because 
OPTIONS:
- Leslie is a vegetarian.
- Nick is a vegetarian.
Answer:
Nick is a vegetarian.