Question

The Monroe Doctrine stated that the United States could do everything except:

look on European intervention in the Western Hemisphere as an unfriendly act
not interfere with already established European colonies
not expand outside its borders
not become involved in European wars

Answer 1

"Not expand outside its borders."

Explanation: The Monroe Doctrine warned European powers against new colonization/intervention in the Western Hemisphere and said the U.S. would not interfere with existing European colonies or become involved in European wars. It did not forbid U.S. territorial expansion.