The Demand Curve Facing a Firm

The demand curve facing a firm

A) indicates the amount of raw materials and other inputs the firm will purchase,at various prices
B) indicates the amount of the good demanded from that firm by a particular consumer,at various prices
C) indicates the amount of output that customers will purchase from the firm,at various prices
D) shows the minimum price at which the firm can sell any given quantity of output
E) is horizontal in the long run,but upward sloping in the short run