Problem: How does the sentence end?

Brett got along with their boss very well but not Eric because
OPTIONS:
- Brett was a lackadaisical worker.
- Eric was a lackadaisical worker.
Answer: Eric was a lackadaisical worker.

Problem: How does the sentence end?

The products that I just bought didn't go on my shelves because the
OPTIONS:
- products were too weak.
- shelves were too weak.
Answer: shelves were too weak.

Problem: How does the sentence end?

It was colder in the trailer than it was in the house because the heater in the
OPTIONS:
- trailer was broken.
- house was broken.
Answer: trailer was broken.

Problem: How does the sentence end?

Rachel gobbled down the pancakes that Natalie had prepared in the kitchen because
OPTIONS:
- Rachel was so skilled.
- Natalie was so skilled.
Answer:
Natalie was so skilled.