Integrate $\int \cos ^{2} 4 x d x$ A) $\frac{1}{2} x+\frac{1}{16} \sin 8 x+C$

Multiple Choice

Integrate $\int \cos ^{2} 4 x d x$

A) $\frac{1}{2} x+\frac{1}{16} \sin 8 x+C$
B) $\frac{1}{12} \cos ^{3} 4 \mathrm{x}+\mathrm{C}$
C) $\frac{1}{2} x+\frac{1}{8} \sin 8 x+C$
D) $\frac{1}{3} \cos ^{3} 4 x+C$