Dr. Samuel Mudd was convicted as a co-conspirator of Booth in President Lincolns assassination and, for aiding and abetting Booth in his attempt to escape from the federal authorities. He had a conspiracy crime and was convicted and sentenced to life imprisonment.
They opposed it because isolationist sentiment was growing and many people feared American involvement in another war and this was how many Americans view President Wilson's goal of establishing an international peacekeeping organization after World War I. The correct option among all the options that are given in the question is option "D".
Its D - Most africans being transported to the US would likely die on the ships because of the extremely poor conditions before they even reached their deplorable fate.
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