Although Cabral Claimed Brazil for the Portuguese,few Portuguese Migrated to the Area

Although Cabral claimed Brazil for the Portuguese,few Portuguese migrated to the area because

A) they feared hostile native peoples.
B) the area was infected with malaria and other tropical diseases.
C) no important resources were found that would have invited further development.
D) Portuguese claims were negated by the Treaty of Tordesillas.
E) the Portuguese refused to allow the introduction of the encomienda system.