The Dred Scott decision had three important ramifications (results) on the slavery debate. Select all three. The Missouri Compromise was unconstitutional.
Slavery would be banned south of the 36º 30º parallel.
Slavery could not exist south of the Ohio River.
Slaves could never become citizens of the U. S.
Dred Scott is immediately freed from slavery.
Slaves cannot sue in federal court
The North must agree to the fugitive slave act and return any escaped slaves from the the South.

Slaves cannot sue in federal court

Slaves could never become citizens of the U.S.

The Missouri Compromise was unconstitutional.

Explanation:

in 1897, pershing became a tactical officer at west point, and that's where he was given the nickname "black jack." pershing's first name is "john," for which "jack" is a nickname, and he was a white man who commanded black troops. hence "black jack".

to act quickly in times of danger to the united states

because you have to act quickly if you want to live/survive.