How did the invention of the printing press fuel the ideas of the reformation and scientific revolution

Prior to the presence of europeans on the continent, the slave trade in africa a) did not exist in any form. b) was limited to internal trade only. c) included the trans-saharan and indian ocean slave trade. d) was rarely needed due to the lack of an agricultural economy.

What were some of the most important native items adopted by europeans ? what impact did they have on european life ?

Why did french and austrian troops stops revolts in spain and italy