Matt wants to change the dimensions of a wooden storage box. He increases its length, x, by 6 feet and decreases its width, x, by 3 feet. The box’s height remains 3 feet. This expression represents the volume of the box:

3x2 + 9x – 54

Based on the information about the box, which statements are correct?

A. The new length of the box is (x + 6).
B. The new width of the box is (3 – x).
C. The new height of the box is (x + 3).
D. The new width of the box is (x + 6).
E. The new width of the box is (x – 3).
F. The new length of the box is 6x.

(There are multiple answers.)