Which sentence uses a verb that agrees with its pronoun subject?

ASome of the song about the children's games are funny.
BBoth of those cousins studies advance martial arts techniques.
CEach of us wants to see the new action movie.
DSomeone from electronics store contacted customers for a survey

Verified Answer :

the first one would be corect, but " some of the song" is not correct, we'd need " some of the songs".
the second needs a verb in plural, so it's also false,

however, both C. and D. are correct. Also Each and someone are both pronouns, so C. and D. both have a subject that agrees with its pronoun subject.