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

Multiple Choice

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. 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. Only 12 tons may be loaded on the plane. The maximum possible profit for this would be

A) 7.
B) 8.
C) 9.
D) 10.