[Q]: How does the sentence end?

Kenneth cooked a nice meal of spaghetti for Donald at dinner because 

[A]: Donald likes Italian food.


[Q]: How does the sentence end?

Although they had the same tank size, the racecar needed fuel frequently but the truck could go several miles without stopping. The 

[A]: truck was more fuel efficient.


[Q]: How does the sentence end?

Donald liked to sing in the chorus while Steven sang solo because 

[A]:
Donald had a mediocre voice.