The acceleration of an object that is oscillating with simple harmonic motion is described by the equation: a $=-3\mathrm{.}7$ sin$($t$)$ m$/$s$2.$ What is the displacement amplitude of this object $($in cm$)?$ A $0\mathrm{.}37$ cm B $29\mathrm{.}8$ cm C $21\mathrm{.}0$ cm D $17\mathrm{.}5$ cm E $40\mathrm{.}1$ cm