Which of the Following Statements Regarding Graham's Law of Effusion $\degree$

Which of the following statements regarding Graham's law of effusion is correct?

A) Effusion refers to the escape of a gas through a small hole into a region of lower pressure.
B) Gases at higher densities will effuse more rapidly.
C) If the molar mass doubles, the effusion rate doubles.
D) The effusion rate of helium is five times that of neon.
E) The effusion rate of n moles of argon in a 20 L container at 20 $\degree$ C is 10 times that observed with a 2 L container.