To Double the Total Energy of a Mass Oscillating at the End

Multiple Choice

To double the total energy of a mass oscillating at the end of a spring with amplitude A,we need to

A) increase the angular frequency by $\sqrt { 2 }$ .
B) increase the amplitude by $\sqrt { 2 }$ .
C) increase the amplitude by 2.
D) increase the angular frequency by 2.
E) increase the amplitude by 4 and decrease the angular frequency by $\frac { 1 } { \sqrt { 2 } }$ .