Elle Corporation has made a major breakthrough in the development of a web-surfing "pen." Elle has patented the product and is seeking to maximize the profits from it. Elle legally may

A) Require its retailers to sell only Elles products, including the web-surfing pen, and not sell similar competing products

B) Require its retailers to purchase, in addition to the pen, stipulated quantities of other products that are not required to use the web-surfing pen

C) Sell the product at whatever price the traffic will bear even though Elle has a monopoly

D) Sell the product to its retailers upon condition that they do not sell the web-surfing pen below a minimum price