There Are Three Items (A, B, and C) That Are

There are three items (A, B, and C) that are to be shipped by air. The weights of these are 4, 5, and 3 tons, respectively, and the plane can carry 13 tons. The profits (in thousands of dollars) generated by these are 3 for A, 4 for B, and 2 for C. There are four units of each available for shipment. If this were to be solved as a dynamic programming problem, how many stages would there be?

A) 1
B) 2
C) 3
D) 4