The primary difference between the small-population approach (S-PA)and the declining-population approach (D-PA)to biodiversity recovery is

A) S-PA is interested in bolstering the genetic diversity of a threatened population rather than the environmental factors that caused the population's decline.
B) S-PA kicks in for conservation biologists when population numbers fall below 500.
C) D-PA would likely involve bringing together individuals from scattered small populations to interbreed in order to promote genetic diversity.
D) S-PA would investigate and eliminate all of the human impacts on the habitat of the species being studied for recovery.
E) D-PA would use recently collected population data to calculate an extinction vortex.