A rectangle has a length of three inches less than twice its width. Its area is 20 square inches. What are the dimensions of the rectangle?
A) width = 2 in, length = 10 in.
B) width = 5 in, length = 4 in.
C) width = 10 in, length = 2 in.
D) width = 4 in, length = 5 in.