24pereznicholas 24pereznicholas 21-08-2022 History contestada What was a key cause of the expansion of the African slave trade after 1500? the need for experienced farmers to work the fields in the African savanna the need for experienced farmers to work the fields in the African savanna the demand by European kings who were seeking to raise large armies the demand by European kings who were seeking to raise large armies the demand for cheaper labor in Europe after the Black Death the demand for cheaper labor in Europe after the Black Death the demand for laborers in European colonies in the Western Hemisphere