Doubling Only the Mass of a Vibrating Mass-And-Spring System Produces

Multiple Choice

Doubling only the mass of a vibrating mass-and-spring system produces what effect on the system's mechanical energy?

A) increases the energy by a factor of square root of two
B) increases the energy by a factor of two
C) increases the energy by a factor of three
D) increases the energy by a factor of four
E) produces no change