Problem: How does the sentence end?

Most authors published a book about romance rather than fantasy because the
OPTIONS:
- romance novels sold poorly.
- fantasy novels sold poorly.
Answer: fantasy novels sold poorly.

Problem: How does the sentence end?

Judging a good wine was easy for Ian but not Jeffrey because
OPTIONS:
- Ian had a thorough knowledge of wines.
- Jeffrey had a thorough knowledge of wines.
Answer: Ian had a thorough knowledge of wines.

Problem: How does the sentence end?

The coin sank faster to the bottom of the pool than the ring because the
OPTIONS:
- coin was heavier.
- ring was heavier.
Answer: coin was heavier.

Problem: How does the sentence end?

The violets in the garden of Natalie grew much taller than Rebecca's because
OPTIONS:
- Natalie is great at gardening.
- Rebecca is great at gardening.
Answer:
Natalie is great at gardening.