A mass on a spring A oscillates at twice the frequency of the same mass on spring B. Which statement is correct?

mass-on-a-spring

#1

A mass on a spring A oscillates at twice the frequency of the same mass on spring B. Which statement is correct?
A. The spring constant for B is one quarter of the spring constant for A.
B. The spring constant for B is 4 times the spring constant for A.
C. The spring constant for B is half of the spring constant for A.
D. The spring constant for B is 1.41 times the spring constant for A.
E. The spring constant for B is twice the spring constant for A.

Answer:

the frequency is proportional to the √ of the spring constant