Oxygen Molecules Are 16 Times More Massive Than Hydrogen Molecules

Oxygen molecules are 16 times more massive than hydrogen molecules.At a given temperature,how do their average molecular speeds compare? The oxygen molecules are moving

A) four times faster than the hydrogen molecules.
B) at 1/4 the speed of the hydrogen molecules.
C) sixteen times faster than the hydrogen molecules.
D) at 1/16 the speed of the hydrogen molecules.
E) at 1/ the speed of the hydrogen molecules.