Which Statement About Environmental Stochasticity Is True

Which statement about environmental stochasticity is true?

A) Environmental stochasticity places grizzly bears in Yellowstone National Park at risk for extinction despite the average positive growth rate of this population.
B) There is no fundamental difference between environmental stochasticity and demographic stochasticity.
C) In a situation of environmental stochasticity, the underlying birth and death rates of individuals are constant across years.
D) Extinction is much less likely to occur during periods of environmental stochasticity.