Map of North America with four spots labeled—A is a point anywhere in Canada, B is in the middle of the continental United States, C is in Puerto Rico, labeled Puerto Rico, D is a point anywhere in Mexico, and E is at Guantánamo Bay, Cuba, labeled as U. S. Naval Base at Guantánamo Bay, Cuba. Would twin babies born at Point D have U. S. citizenship?

It would depend on the citizenship status of the babies' parents.
It would depend on whether the parents move to the United States.
Yes, the babies would be native U. S. citizens by the law of the blood.
Yes, the babies would be native U. S. citizens by the law of the soil.