A shipping carton for a rolled-up poster has the shape of a triangular prism. Each end of the carton is a triangle with a base 6 inches long and a height of 5 inches. The length of the carton is 32 inches. What is the volume of the carton?
A. 43 in3 B. 86 in3 C. 240 in3 D. 480 in3