It is the United States’ policy of asserting its full
authority over the American continent in 1823. It further states that any attempt
at colonization by European countries on lands in North and South America will
be viewed as an act of aggression by the U.S. government and will be a cause
for intervention.
Your answer would be radical
They did that to prove that they mean business and that they are mean.
D. Return of the republicans is your answer.