<u><em>Warned against European influence</em></u> in the Western Hemisphere is the correct answer.
Explanation:
Monroe Doctrine was established by president James Monroe in 1823. This policy established the policy of US Regarding the Western Hemisphere. There were two major points of Monroe doctrine, the first point was that US would not allow the European powers to establish colonies in North and south america or to interfere with the independent countries in the continent. The second point was that the US would not interfere in the affairs of Existing European colonies. This doctrine was established because US was afraid that due to the independence of the American colonies from European powers, Spain and France would try to regain their colonies. <u><em>The doctrine was a clear message that it wont allow the European monarchies to regain power in US</em></u>.
<em>Well, The four pillars of the policies were to: Reduce marginal tax rates on income from labor and capital. Reduce regulation. Tighten the money supply to reduce inflation. </em><em>Good Luck!</em>
