Which of the following were examples of conflict between federal and state authority in the years leading up to the Civil War? A: Monroe Doctrine encroaching on states' rights
B: Violation of popular sovereignty by the Kansas-Nebraska Act
C: South Carolina Nullification Crisis and Southern secession
D: Seneca Falls Convention and the rise of abolitionism

haha! : )

nice one lol

in his book, the riddle of the rosetta stone, james giblin talks about how there was a young british polymath and physician named thomas young who made a lot of advances on the deciphering of the rosetta stone. he says that even though young made a lot of mistakes because he was working under false assumptions, he also made huge contributions like deciphering three out of the seven symbols (more than anyone else before him). young published his findings and continued his good work but he wasn't able to progress much further due to some unfavorable situations, he still laid the basis for many other scholars and of course for the man who has been generally known to have deciphered it, jean-françois champollion

b. martin luther king jr. wrote and spoke "i have a dream"

explanation:

i know this 100 percent is correct   b. is the best one. < 3