In order to be a successful price discriminator, a provider must have a degree of market power (depicted by a downward-sloping demand curve) and meet what other condition(s)? Prospective customers must be categorized according to willingness-to-pay. A. Prospective customers must be categorized according to willingness-to-pay. B. Opportunities for resale of the good or service must be limited. C. The provider must have excess capacity to accommodate the extra business. D. Both a and b.