Which issues led to the decline of the Roman Empire? Select all correct answers.

a/ low taxes on Roman citizens

b/ cruel and incompetent emperors

c/ attacks from barbarian tribes

d/ epidemics of foreign diseases

the answer would be logic.

the answer would be:

b. race

besides the fact that abraham lincoln abolished slavery, and greatly benefit black people, he had a heavy impact of the definition of what democracy was, and should be.