Direct characterizaation is what the author says about the character.
So B would be correct
In order to be sure you are always have enough of the right food in hand and get the best prices, in a situation in which customer dogs have many different dietary needs, and a lot of vendors on the other hand, you should use<span> a supply chain management system (SCM) to track vendor information, food usage trends, and food expiration. With SCM you will manage the flow of goods.</span>
This isn't possible except you have a system where there isn't competition and the survival of the fittest in the aspect of the food chain
