A simple harmonic oscillator's position$-$time function is:

$x(t)=0\mathrm{.}03mcos(2t+\frac{}{4})$

This oscillator makes one oscillation every

Select one:

a$.2$ seconds

b$.0\mathrm{.}318$ seconds

c$.2p$ seconds

d$.3\mathrm{.}14$ seconds