[Q]: How does the sentence end?

Joel spent more time with their son than Randy did because

[A]: Joel had primary custody of the boy.

[Q]: How does the sentence end?

Although Kenneth was a better writer than Brett,

[A]: Kenneth had difficulty writing convincing romantic characters.

[Q]: How does the sentence end?

Adam loved eating all kinds of fruits, but Donald only ate meats.

[A]:
Donald was sad to eat a watermelon.