Problem: How does the sentence end?

I always use reusable bag rather than plastic bag when I shop because the 
OPTIONS:
- reusable bag is friendly for the environment.
- plastic bag is friendly for the environment.
Answer: reusable bag is friendly for the environment.

Problem: How does the sentence end?

The children were afraid to go in the kitchen, but loved the basement, as the 
OPTIONS:
- kitchen was a foreboding place.
- basement was a foreboding place.
Answer: kitchen was a foreboding place.

Problem: How does the sentence end?

Cynthia wanted to buy the children some toys, but Jennifer said not to. 
OPTIONS:
- Cynthia thought toys were a fun use of spending money.
- Jennifer thought toys were a fun use of spending money.
Answer: Cynthia thought toys were a fun use of spending money.

Problem: How does the sentence end?

Nelson was required to keep a food journal that Derrick was not because 
OPTIONS:
- Nelson had already completed a diet.
- Derrick had already completed a diet.
Answer:
Derrick had already completed a diet.