Consider a monopolist facing positive marginal costs and a downward-sloping demand curve. Suppose the rm chooses a positive level of output so that prot is maximized. under these conditions, which of the following statements is true? O Demand is perfectly inelastic at the prot-maximizing level of output. Q Demand is inelastic at the prot-maximizing level of output, but not perfectly inelastic. 0 Demand is unit-elastic at the prot-maximizing level of output. O Demand is elastic at the prot-maximizing level of output, but not perfectly elastic. O Demand is innitely elastic at the prot-maximizing level of output