Frequently in American Economic History, the Government Has Regulated a Firm's

Frequently in American economic history, the government has regulated a firm's prices

A) even when it is farfetched to think of the firm as a natural monopoly.
B) to force a firm to face intense competition at the beginning stages of its existence.
C) to prevent international competition from capturing a market.
D) to raise government revenue.
E) to lower the cost of living.