In 1978,a Drought on the Galapagos Islands Caused a Reduction

In 1978,a drought on the Galapagos Islands caused a reduction in the production of seeds upon which one of Darwin's finches,a kind of bird,fed.This caused a decrease from 1,400 to 200 birds.This population change factor

A) would not be considered a part of the carrying capacity for these birds.
B) was density-dependent.
C) was density-independent.
D) resulted in exponential growth for the bird population.