A Boy and a Girl Are Riding on a Merry-Go-Round

Multiple Choice

A boy and a girl are riding on a merry-go-round that is turning. The boy is twice as far as the girl from the merry-go-round's center. If the boy and girl are of equal mass, which statement is true about the boy's moment of inertia with respect to the axis of rotation?

A) The boy has a greater moment of inertia, but it is impossible to say exactly how much more.
B) His moment of inertia is twice the girl's.
C) His moment of inertia is 4 times the girl's.
D) The moment of inertia is the same for both.
E) His moment of inertia is half the girl's.