Which of these happened before the Dred Scott v. Sanford case was brought before the Supreme Court?

А
Roger Brooke Taney ruled that Congress had no authority to prohibit slavery in new
territories, making the Missouri Compromise unconstitutional.
B. Roger Brooke Taney read the Supreme Court opinion, which stated that slaves were not
citizens of the United States.
C. Dred Scott and his wife Harriet were taken from Missouri into territory where slavery had
been abolished.
D. Dred Scott's case stunned and incensed many abolitionists and became a catalyst for
the Civil War.

the answer is use of support  

here are some major conflicts i found. maybe pick one and do more research on it. (cause i ain't writing 6 paragraphs)

in 1877, the nez perce war took place.

1881 - president james garfield was assassinated.

1882 - the chinese exclusion act was passed.

1883 - a decision in the civil rights cases legalized racial segregation in the united states.

1887 - the dawes act was passed.

1893 - the panic of 1893 took place. (what a creative name)

and there are probably other topics you can find if you just search up "united states timeline," or "conflicts in the 19th century for america."

then once you find a topic you like find out how it affected the people of america and what not. (sorry if this feels a bit short changed, history was and never will be one of my strong topics)