[Q]: How does the sentence end?

The tone of the guitar was more pleasant than the sound of the piano because the

[A]: piano was out of tune.

[Q]: How does the sentence end?

The concert goes poorly for Christopher, but Lawrence performed very well.

[A]: Christopher was avoiding practicing beforehand.

[Q]: How does the sentence end?

Betty made rice wine vinegar to bring it to Samantha, since

[A]:
Samantha was unable to make it themselves.