In less than two years in the early 1920s, the cost of a German newspaper rose from 0.30 marks to 70,000,000 marks. This is a spectacular example of a. market power caused by a change in the country’s standard of living. b. market power caused by a single firm controlling the newspaper production. c. inflation caused by increased productivity in the economy. d. inflation caused by an increase in the quantity of money in the economy.