A company has three products possible products that it can produce in a machine intensive production process. Capacity is constrained by the number of hours the machines can run during a period and the products are so popular that all units produced will be sold. Here is additional information: 

                                                                Product A      Product B    Product C

Contribution per unit                              $20                   $30               $40
Machine hours per unit                           2.5                    3.25               4.5

Which of the following would be an accurate conclusion based on these facts?

A. Since Product C has the greatest contribution margin per unit and therefore emphasizing its production and sales will lead to the highest operating income in the short-run

B. Since A takes less time to produce, maximization of operating income will occur by emphasizing production and sales of A.

C. A balanced mix of 1/3 A, 1/3 B, and 1/3 C should be the goal when maximizing operating income in the short-run.

D. Product B should be emphasized if the goal is to maximize contribution margin.