A Point on the End of a Tuning Fork Moves $d = a \sin \omega t$

Multiple Choice

A point on the end of a tuning fork moves in simple harmonic motion described by $d = a \sin \omega t$
Find $\omega$ given that the tuning fork for middle C has a frequency 270 of vibrations per second.

A) $\omega = 270 \pi$
B) $\omega = 810 \pi$
C) $\omega = 540 \pi$
D) $\omega = 1080 \pi$
E) $\omega = 271 \pi$