The polynomial x³+5x²-57x-189 expresses the volume, in cubic inches, of a shipping box, and the width is ( x+3) in. If the width of the box is 15 in., what are the other two dimensions? (Hint: The height is greater than the depth.) Select one:
A. height: 21 in. depth: 5 in.
B .height: 19 in. depth: 7 in.
C. height: 21 in. depth: 7 in.
D. height: 19 in. depth: 5 in.