Find the integral.

${\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}(5x^3)(4-x^2)dx$

A$.20-\frac{5}{3}{x}^3{x}^4-\frac{1}{6}{x}^{6}C$

B$.20x-\frac{5}{3}{x}^3{x}^4-\frac{1}{6}C$

c$.20x-\frac{5}{3}{x}^3{x}^4-\frac{1}{6}{x}^{6}C$

D$.20x-\frac{5}{3}{x}^3\frac{5}{3}{x}^4-\frac{1}{6}{x}^{6}C$