What made slavery legal was D. the Bill of Rights, Because amendment 13 officially abolished slavery in the United States and continues to this day.
So D. is your anwser.
Hope this helps. :)
One of the primary consequences of the railroad in the United States was the creation of a system by which goods could easily be moved east to west, opening new sections up that were previously only accessible by horse or on foot.
Answer:
President Herbert Hoover dedicated the Empire State Building on May 1, 1931
Explanation:
The answer is D: they have a similar range of personality characteristics as do those in general population without down syndrome
