Answer:
A) By product pricing
Step-by-step explanation:
If you are able to sell your companies by products it is a great way to make more money and to reduce costs. Imagine if the cheese factories needed to throw away all that brine. They would need to develop some waste disposal facility which obviously costs money to build and operate. Instead they are lowering their costs by selling it and at the same time are getting more money. They would probably even give it away for free if no one was willing to pay for it.