<span>Well this isn't actually a question but to market to a company like this you first have to impress a small number of people in a single chain of command. Your products don't have to be marketed to a company as a whole or to a single rung of the food chain but to each successive member in a hierarchy in the company. Firstly to the employee, then to their management then to the ones who actually making the decision to buy.</span>
Answer:
I believe it is cellulose, I'm not a 100% sure
That would be A.
Cells have specific receptors for different hormones that allow the intake of them.