What did Dred Scott decision mean for citizenship in the United States?

The supreme Court building on the 14th amendment, which is birthright citizenship to all people born in US regardless of race
The Supreme Court said that Black people in United States, have no rights which the white man was bound to respect, and they ruled that black Americans were not citizens of the United States, which created a new legal president that African-Americans were in under class in the US
The Supreme Court said that black United States were free citizens just like white people in the the US and ruled that formally enslaved people who fled to the north were free
The Supreme Court ruled that separate, but equal was the law of the land

The correct answer is: The Supreme Court said that Black people in United States have no rights which the white man was bound to respect, and they ruled that black Americans were not citizens of the United States, which created a new legal precedent that African-Americans were an underclass in the US.