[Q]: How does the sentence end?

Since Tom heard a noise when he applied the brake, he decided to fix the caliper rather than the rotor, because the
OPTIONS:
- caliper was silent.
- rotor was silent.

[A]: rotor was silent.

[Q]: How does the sentence end?

Jennifer asked Rachel what color the trousers were trimmed with, but
OPTIONS:
- Jennifer didn't know.
- Rachel didn't know.

[A]: Rachel didn't know.

[Q]: How does the sentence end?

The man added water to the car, but didn't need to add any oil, because the
OPTIONS:
- water reservoir was low.
- oil reservoir was low.

[A]:
water reservoir was low.