Find the Requested Value $f(x)=x^{2}+3 x+6$ And $g(x)=4 x-1$ , Find $f g(x)$

Multiple Choice

Find the requested value.
-If $f(x) =x^{2}+3 x+6$ and $g(x) =4 x-1$ , find ( $f g(x)$ .

A) $4 x^{3}-11 x^{2}-21 x-6$
B) $16 x^{2}+4 x+4$
C) $4 x^{3}+11 x^{2}+3 x-1$
D) $4 x^{3}+11 x^{2}+21 x-6$