Marx and engels believed the industrial revolution had separated people into two separate classes: the bourgeoisie and the .

proletariat is your answer

I think the answer is b

Explanation:

c. bounced back and forth from worthless to worth a lot and back to worthless

abraham lincoln  (february 12, 1809  – april 15, 1865) was an american statesman, politician, and lawyer who served as the 16th  president of the united states  from 1861 until  his assassination  in april 1865. lincoln led the nation through the  american civil war, its bloodiest war and its greatest moral, constitutional, and political crisis.[2][3]  he preserved the  union,  abolished slavery, strengthened the  federal government, and modernized  the u.s. economy.