Question

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

Answer 1

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.