The correct answer is A) Congress alone has the ability to enact a uniform rule of naturalization.
Article I, Clause 4 of the US Constitution determines that <em>the Congress shall have the power to establish a uniform Rule of Naturalization, and uniform laws on the subject (…)</em>
In the Dred Scott case, the Supreme Court determined that Congress has the power over nationality and naturalization because of those concern its relations and intercourse with other countries.
