Find the Fourth Term of the Taylor Series for the Function

Multiple Choice

Find the fourth term of the Taylor series for the function $f(x) =\cos x$ about $x=\pi / 3$ .

A) $\frac{\left(x-\frac{\pi}{3}\right) ^{3}}{12}$
B) $-\frac{\left(x-\frac{\pi}{3}\right) ^{3}}{12}$
C) $\frac{\sqrt{3}\left(x-\frac{\pi}{3}\right) ^{3}}{12}$
D) $-\frac{\sqrt{3}\left(x-\frac{\pi}{3}\right) ^{3}}{12}$