Answer:
The answer is D. Laissez-faire policies in American business allowed monopolies and trusts to develop, causing small companies to suffer.
Step-by-step explanation:
Laissez-faire policies mean that the less the government is involved in the economy, the better off business will be. Without government's antitrust efforts, fast-growing businesses accumulate capital and become trusts and other monopolies. Consequently, the small businesses are damaged badly because they can't compete with the monopoly giants.