The Demand Curve Facing a Monopolistically Competitive Firm Is Quite

The demand curve facing a monopolistically competitive firm is quite elastic because

A) there are many close substitutes to the good the firm is producing.
B) the industry is producing a homogeneous product.
C) of the possibility of entry of new firms.
D) goods that are complements to the good the firm is producing also have elastic demand curves.
E) firms are not behaving strategically.