D) the sixteenth amendment allowed congress to break up monopolies
Explanation:
The Sixteenth Amendment to the Constitution of the United States (Amendment XVI) allows the United States Congress to tax an income tax without apportioning it among the states according to their population or based on the results of a census. This amendment excluded Income Tax from the constitutional requirements of direct taxes, after taxes on income, dividends and interest were qualified as direct taxes by the Supreme Court ruling in the Pollock case against Farmers' Loan & Trust Co. (1895). It was ratified in February 1913.
In Shays rebellion Mass. farmers revolted and the state government could barely control it. This scared people because they didn't know if the state government would be able to handle another. So they decided they needed a stronger federal government than the Articles could provide.
