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 ? 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) $\omega = 271 \pi$ ?