Question

Translate the phrase: Who likes to sing?

a. ¿Les gusta cantar?
b. ¿Le gustaba llorar?
c. ¿A quién le gusta cantar?
d. ¿A quién no le gusta cantar?

Answer 1

C. It asks the question to a group of people instead of just one like A and B. D means who doesn't like to sing. 

Answer 2

C because your asking a lot of people not just one