Which action increased the tensions between the north and the south that led to the civil war?

the dred scott decision

the election of ulysses s. grant

the formation of the whig party

the impeachment of president johnson

in 342 bc j._c. egypt fell into the hands of the persians, under the reign of nectanebo ii

greek city-states unite in a revolt against the persian empire at the beginning of the fifth century bc. j.-c  

from the year 660 or 659 bc ad, cyrus preached the revolt against the medes to deliver the persians.

i think it is the third one.