Problem: How does the sentence end?

Eric was constantly harassing Kevin at work but he never responded.
Answer: Kevin was very calm.

Problem: How does the sentence end?

Katrina wanted to start a debate with Elena because
Answer: Elena was ill informed and would lose.

Problem: How does the sentence end?

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

Problem: How does the sentence end?

The belly button of Christopher has lint in it, while Matthew's has none, so
Answer:
Matthew is the cleaner person.