Under Conditions of Oligopoly, Economies of Large-Scale Production Mean That

Under conditions of oligopoly, economies of large-scale production mean that:

A) firms are able to sell all of the output they produce.
B) it is difficult for a firm to determine its profit-maximizing price and output.
C) large firms would find it more profitable to break up into smaller production units.
D) small firms are at a cost disadvantage when competing with relatively large firms.
E) small firms are at a cost advantage compared to relatively large firms because of the presence of economies of scope.