Answer:
The answer is: A) Produce the products with the highest contribution margin per unit of constrained resource.
Explanation:
Follow my example:
A brewery produces two types of beer; dark and light. They share the same ingredients, malt and wheat. You can get all the wheat they need but only 500 units of malt.
Your total production can be 250 dark beers with a $750 profit, or 500 light beers with a $1,000 profit.
You should only produce light beer since your contribution margin per unit of malt is $2, while dark beer's contribution margin per unit of malt is $1.50