Hey all. I am struggling interpreting this word problem so any assistance will be greatly appreciated.

A rectangular floor is covered by a rug except for a strip p meters wide along each of the four edge. If the floor is m meters by n meters, what is the area of the rug in square meters?

A) mn-p(m+n)
B) mn-2p(m+n)
C) mn-p^2
D) (m-p)(n-2p)
E) (m-2p)(n-2p)