Problem: How does the sentence end?

John wanted to make his own soda with carbonated water and a flavor but the
OPTIONS:
- water was flat.
- flavor was flat.
Answer: water was flat.

Problem: How does the sentence end?

Before meditating in the evening, Natalie asked Tanya to stop playing the electric guitar, because
OPTIONS:
- Natalie needed quiet.
- Tanya needed quiet.
Answer: Natalie needed quiet.

Problem: How does the sentence end?

Rebecca was instructing Katrina on how to ski because
OPTIONS:
- Rebecca was an instructor on the mountain.
- Katrina was an instructor on the mountain.
Answer: Rebecca was an instructor on the mountain.

Problem: How does the sentence end?

Christopher considered the matter settled after telling William to stop, but
OPTIONS:
- Christopher wasn't intimidated, and it kept happening.
- William wasn't intimidated, and it kept happening.
Answer:
William wasn't intimidated, and it kept happening.