The Sustainability of Extractive Reserves in Brazil Has Become Threatened

The sustainability of extractive reserves in Brazil has become threatened because

A) global demand for petroleum has led to more drilling.
B) strip mining has destroyed a portion of the mountain range.
C) the rainforest is a dangerous place.
D) ecotourism has created a new economy around ancient ruins.
E) competition for forest land has created conflict with other economic activities.