If the HHI for an Industry Equals 3,200

If the HHI for an industry equals 3,200,

A) firms in the industry must enter a cartel in order to earn an economic profit.
B) firms in the industry are most likely to make zero economic profit.
C) the industry is probably an oligopoly.
D) firms in the industry are likely to act independently of each other.
E) the industry is almost surely monopolistic competition.