What problem did john d. rockefeller face in his deal with cornelius vanderbilt?

explanation:

hitler's  "rise" can be considered to have ended in march 1933, after the reichstag adopted the enabling act of 1933 in that month. president paul von hindenburg had already appointedhitler  as chancellor on 30 january 1933 after a series of parliamentary elections and associated backroom intrigues.

answer:

it caused mass african migration, african populations to grow, african empires to topple, and racism against slaves to emerge.