CBC s an d d s a d d s s s s
The "he" here is Constantine the Great, and he moved the capital of the Roman Empire to the city named Constantinopole, previously Byzantium, which today is known as Istanbul, Turkey's biggest city.
The correct answer is A) the doctrine helped the US form a military base that kept European Nations at bay.
<em>The Monroe Doctrine was important to the US during James Monroe's presidency because the doctrine helped the US form a military base that kept European Nations at bay.</em>
During an annual Presidential speech, President James Monroe referred to this doctrine, a new form of foreign policy that stated that European nations should never intervene again in American issues. The message was clear, European nations were not to interfere in any country of the American continent. It also stated that the United States would remain neutral in any European conflict. The Monroe Doctrine was used on December 2, 1823, and it was a clear US statement against European colonization.
What made slavery legal was D. the Bill of Rights, Because amendment 13 officially abolished slavery in the United States and continues to this day.
So D. is your anwser.
Hope this helps. :)