If the Rms Speed of Helium Atoms Is V_rms,He at Temperature

If the rms speed of helium atoms is v_rms,He at temperature T,what is the rms speed of CO₂ at the same temperature?

A) $$\nu _ { \operatorname { rms} , H e } / 44$$
B) $$\nu _ { \operatorname { rms} , H e } / 11$$
C) $v _ { \operatorname { rms} , H { e } } / \sqrt { 44 }$
D) $v _ { \operatorname { rms} , H { e } } / \sqrt { 11 }$
E) $\nu _ { \operatorname { rms} , \mathrm { He } } / \sqrt { 22 }$