Which pronoun correctly fills the blank?

Not all of these boys are acting in the play; some of ______ are helping with preparations for setting the stage.
A.
him
B.
his
C.
their
D.
them

1 answer

The correct pronoun to fill the blank is D. them. The complete sentence would read: "Not all of these boys are acting in the play; some of them are helping with preparations for setting the stage."