Technological Change Allows Perfectly Competitive Firms to ________ and Leads

Technological change allows perfectly competitive firms to ________ and leads to ________.

A) lower their costs; lower prices for consumers
B) raise their prices; higher prices for consumers
C) lower their costs; deadweight loss
D) raise their costs; higher prices and maximum profits in the long run
E) lower their costs; higher prices so the firms can earn economic profits in the long run