Which of These Was NOT Descriptive of the African Continent

Which of these was NOT descriptive of the African continent?

A) The mortality rate for visiting Europeans was probably higher than that for slaves being taken to the Americas.
B) Coastal African traders often exaggerated tales of many savages lying in wait for any intruders who might venture away from the coast.
C) Europeans could not take their animals into the interior, because the diseases that killed men also killed horses and mules.
D) Most rivers running toward the coast have now been determined to be fairly easy to navigate, despite the warnings of the original traders.
E) The Africans lacked knowledge in military and technological matters.