In 1914, americans believed that the monroe doctrine encouraged them to follow a policy of

In 1914, many Americans believed that the Monroe Doctrine encouraged them to follow a policy of "protectionism", since this doctrine stated that any further efforts by European nations to colonize the Americas would lead to an American retaliation. 

Is there a passage that comes with this question or should i know this right off the bat, because if it is, i probably have short term memory loss or college is too stressful