Problem: How does the sentence end?

Laura was a frugal shopper whereas Christine was the opposite.
OPTIONS:
- Laura could never buy that much stuff at once.
- Christine could never buy that much stuff at once.
Answer: Laura could never buy that much stuff at once.

Problem: How does the sentence end?

After mastering the harp, the musician moved onto the trumpet, because the
OPTIONS:
- harp excited them now.
- trumpet excited them now.
Answer: trumpet excited them now.

Problem: How does the sentence end?

Math was very hard for Hunter, but not for Brian, so
OPTIONS:
- Hunter used a more visual method.
- Brian used a more visual method.
Answer: Hunter used a more visual method.

Problem: How does the sentence end?

Erin was ready to retire but Rachel was not able to yet because
OPTIONS:
- Erin young.
- Rachel young.
Answer:
Rachel young.