Kara is sending a gift to her grandmother. The gift is wrapped in a cube-shaped box with side lengths of 6 inches. She wants to use the shipping box that is closest to the size of her gift. The table shows the cube-shaped shipping boxes that the post office has available for her to use. A. 64in^3, B. 125 in^3, C. 343 in^3, D. 729 in^3.

C. 343 in^3 because if it's a cube and the length is 6, then the equation for volume if length times width times height which is 6 to the third power. 6 to the third power is 216 in^3 but since it's asking for the size closest to the box, 343 is the one that is best suitable.