When Selecting the Degree of Market Exposure for a Firm's

When selecting the degree of market exposure for a firm's products,it's important to remember that

A) vertical arrangements between producers and intermediaries that limit sales by customer or territory are always illegal.
B) the Federal Trade Commission prohibits exclusive distribution.
C) vertical arrangements between producers and intermediaries that limit sales by customer or territory may be legal,according to a recent Supreme Court ruling.
D) horizontal arrangements among competing producers or intermediaries which limit sales by customer or territory are generally considered legal.
E) None of these answers is correct.