A rectangular painting is 24 inches long and 9 inches wide. Which equation can be used to find the perimeter of the painting?
A 24 inches + 9 inches = ___ inches
B 24 inches + 24 inches + 9 inches + 9 inches = ___ inches
C 24 inches x 9 inches = ___ square inches
D 24 inches x 24 inches x 9 inches x 9 inches = ___ square inches