Why did events at harpers ferry worsen tensions between the north and the south

a. john brown's attack on harpers ferry increase the fight over slavery

b. john brown provided weapons to slavery supporters in harpers ferry

c. dred scott was from harpers ferry

d. the people in harpers ferry supported the abolitionists

How does the principle of federalism affect the u.s. government? a. it guarantees that the united states will always be a representative democracy b. it ensures that the state governments have greater authority that the federal government c. it creates both separate and overlapping powers for the federal and state governments d.it divides the federal and state governments into three branches