If We Double the Root-Mean-Square Speed (Thermal Speed)of the Molecules

Multiple Choice

If we double the root-mean-square speed (thermal speed) of the molecules of a gas,then

A) its temperature must increase by a factor of 4.
B) its temperature must increase by a factor of 2.
C) its temperature must increase by a factor of .
D) its pressure must increase by a factor of 2.
E) its pressure must increase by a factor of 4.