B. The powers that are not specifically assigned to the federal government
Srry i'm soo late but the answer is A. President McKinley's desire for war.
Hope i Helped :)
The 1839 Treaty of London was a treaty between Great
Britain, Austria, France, Prussia, and Russia, on the one part, and The
Netherlands, on the other. It derives its significance from Article 7 that
leads Britain to protect the neutrality of Belgium in the event of the latter's
invasion.
The main idea in the 9th amendment is that certain rights are to be protected from the government interfering with them, such as, people having freedom of speech of religion and others