How did the Dred Scott decision regulate slavery?

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Explanation:

Taney announced in a 7-2 ruling against Dred Scott that Congress had no right to prohibit slavery in the territories, that slaves were property, and that slave owners could not be deprived of their property without due process. With this decision, the Court supported the idea that there could be “property” in people. The Dred Scott v. Sandford case (1857) was the most important slavery-related decision in the United States Supreme Court's history. The purpose was to balance the Congressional strength of the two factions by making sure an equal number of slave and free states were admitted to the Union.

b.europe i believe because north america has 3 countries in a way and with all the stuff with illegal immagrants from mexico or whatever so i would say europe.

the space race was a battle to make advanced technology to get to the moon and to get a better understanding of space.