16. A major distinction between a monopolistically competitive firm and an oligopolistic firm is that:
A. one is a price-taker and the other is a price-maker.
B. a recognised interdependence exists between firms in one industry, but not in the other.
C. one always produces differentiated products, and the other always produces a homogeneous product.
D. one necessarily faces a downward-sloping demand curve, and the other a horizontal demand curve.