The displacement of a particle is represented by the equation $\mathrm{y}={\sin }^3 \mathrm{\omega t}$. The motion is :

• A

  non-periodic

• B

  periodic but not simple harmonic

• C

  simple harmonic with period $2\mathrm{\pi }/\mathrm{\omega }$.

• D

  simple harmonic with period $\mathrm{\pi }/\mathrm{\omega }.$