Tom has a rectangular prism-shaped suitcase that measures 9 inches by 9 inches by 24 inches. He needs a second suitcase that has the same volume but a smaller surface area than his current suitcase. Which suitcase size would fit Tom's needs?
a. 12 inches by 10 inches by 9 inches
b. 16 inches by 5 inches by 9 inches
c. 18 inches by 9 inches by 12 inches
d. 18 inches by 18 inches by 6 inches