Why are monopolies a problem for an economy

Monopolies restrict free trade and prevent the market from setting prices. Price fixing: Since monopolies are lone providers, they can set any price they choose. That's called price-fixing. They can do this regardless of demand because they know consumers have no choice.

Explanation:

Monopolies restrict free trade and prevent the market from setting prices.

the answer is d. selective incorporation. (apex)

the correct answers are: 1) lay and collect taxes and duties; 2) pay debts; 5) borrow money;   6) regulate commerce with foreign nations.

article 1, section 8. refers to the powers of congress. according to the united states constitution: “the congress shall have the power to lay and collect taxes, duties, imposts, and excises, to pay the debts and provide for the common defense and general welfare of the united states.”