The Supreme Court Opinion in Dred Scott V

The Supreme Court opinion in Dred Scott v. Sandford asserted which of the following?

A) Slaves were not citizens under the Constitution and Congress could not outlaw slavery in the new territories.
B) A slave had a right to seek freedom across state lines.
C) Congress could outlaw slavery in the new territories, but any slaves who escaped had to be returned to their owners.
D) Congress had misinterpreted the intentions of the Framers and slave owners should be allowed to import more slaves from overseas.