Which of the Following,related to the Early Explorations of the Portuguese

Which of the following,related to the early explorations of the Portuguese and Spanish,is true?

A) Europeans did not venture beyond the Straits of Gibraltar, fearing a torrid zone.
B) Henry the Navigator led a crusade-type attack to capture a fortress in Morocco.
C) Cartographers lacked the knowledge to indicate many of the newly-found locations on maps.
D) Spain and Portugal felt that natives found in the new areas were not worthy of conversion to Christianity.
E) Slavery was never part of early exploration.