The main object of the opening sentence of the Fourteenth Amendment was to settle the question, upon which there had been a difference of opinion throughout the country and in this Court, as to the citizenship of free negroes (Scott v. Sandford, 19 How. 393),
(you stopped there yet the sentence continued...see the comma?)
and to put it beyond doubt that all persons, white or black, and whether formerly slaves or not, born or naturalized in the United States, and owing no allegiance to any alien power, should be citizens of the United States and of the state in which they reside. Slaughterhouse Cases, 16 Wall. 36, 83 U. S. 73; Strauder v. West Virginia, 100 U. S. 303, 100 U. S. 306
Then you carry on with the rest.
Why did you leave that off without even placing an ellipsis?
My point being is that one should not take my word for it, but go actually read & study for themselves to show themselves approved. Congratulations! You passed!