Which Statement Is NOT True Regarding Indigenous Ecology

Which statement is NOT true regarding indigenous ecology?

A) Many believe that indigenous peoples possess a great deal of knowledge about their physical environment.
B) Today indigenous peoples are often seen as conservators of their habitat, but in colonial times they were perceived as destroyers of the habitat for political reasons.
C) The majority of national parks in Central and South America are home to indigenous populations.
D) In most cases, indigenous farming practices provide higher crop yields than "modern" farming practices.