Which best describes the changes brought to world populations as a result of the european colonization of the americas? answer choices are, a: the african population nearly doubled, the european population dropped greatly, and millions of native americans were sent to europe as slaves. b: the european population nearly doubled, the native american population dropped greatly, and millions of africans were sent to the americas as slaves. c: the native americans population nearly doubled, the african population dropped greatly, and millions of europeans were sent to africa. d: the africa population nearly doubled, the native amrican population dropped greatly, and millions of europeans were sent to the americas as slaves.