The volume of a shipping box is the product of its length, width, and height, or. A sealed brown box which has a height of 5, length of x plus 1, and front width of x. The volume of the box is modeled by the function. What is the volume when?
A. 5x(x + 1)
B. x² + x + 5
C. 5x² + 5x
D. x(x + 1) + 5