What is the area of the figure?
An irregular figure is shown. Starting from the bottom left corner of the figure, the outline of the figure moves up 18 feet, to the right 9 feet, down 9 feet, to the right 9 feet, down 9 feet, and to the left 18 feet to end at the starting point.
A.72 square feet
B.162 square feet
C.243 square feet
D.324 square feet