Which statement best describes the bolshevik revolution?

a)it was begun by joseph stalin.
b)it began a civil war in russia.
c)it toppled tsar nicholas ii from power. eliminated)it prevented russia from exiting world war i.

lincoln presided over the union victory in the american civil war, which dominated his presidency. a former whig, lincoln ran on a political platform opposed to the expansion of slavery in the territories. his election served as the immediate impetus for the outbreak of the american civil war.

first second and third

explanation: