Assuming All of These Samples of Gas Are at the Same

Assuming all of these samples of gas are at the same temperature, which will escape through a hole in a balloon at the lowest rate?

A) 20 moles of H₂ in a 12 L balloon
B) 3 moles of Xe in an 18 L balloon
C) 8 moles of Ne in a 24 L balloon
D) 4 moles of Cl₂ in a 16 L balloon
E) 12 moles of He in a 24 L balloon