<span>D. Monopolies shut out competition
Monopolies are prevented because of the Sherman Antitrust Act of 1890, which regulates and takes apart monopolies, as well as protecting small business owners from collapsing and consumers from high prices.
Hope this helps</span>
Answer:
Battle of Midway
Explanation:
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<span>The Vietnam ceasefire was signed on January 27, 1973.</span>
A) <span>On this day in 1956, the U.S. Congress approves the Federal Highway Act, which allocates more than $30 billion for the construction of some 41,000 miles of interstate highways; it will be the largest public construction project in U.S. history to that date.</span>
