【单选题】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.