A company ships a cube with side lengths of 2 feet in a crate that is a larger cube with side lengths of 4 feet. Packing material is placed around the smaller cube.
Which expression can be used to find the volume of the part of the larger cube that is filled with packing material?
A. 4²-2²
B. 4³-2³
C. (4-2)²
D. (4-2)³