Answer:I think its C
Explanation:This is because it says "The question before us is, whether the class of persons described in the plea in abatement compose a portion of this people, and are constituent members of this sovereignty? We think they are not, and that they are not included, and were not intended to be included, under the word "citizens" in the Constitution, and can therefore claim none of the rights and privileges which that instrument provides for and secures to citizens of the United States. As you can see it talks about Africans and how they should not be citzens according to the constitution. So, its C.