They perfectly understood the meaning of the language they used, and how it would be understood by others; and they knew that it would not in any part of the civilized world be supposed to embrace the negro race, which, by common consent, had been excluded from civilized Governments and the family of nations, and doomed to slavery. –Dred Scott v. Sandford,
Supreme Court of the United States

Which statement best explains the fallacy in the argument?

Taney is quick to assume that the writers of the US Constitution excluded African Americans born in the country from citizenship.
Taney unfairly appeals to human emotion by creating a sense of hopelessness for enslaved persons during the time of the case.
Because the Constitution does not explicitly exclude African Americans from citizenship, Taney is begging the claim.
The men who wrote the Constitution made a mistake in not writing about the position of enslaved people within the nation.