Suppose That Only Two Females and a Small Number of Males

Suppose that only two females and a small number of males are left in a population of a highly endangered bird. Although all of these birds are healthy, by chance, both females fail to reproduce and the population goes extinct. This extinction is best described as a consequence of

A) inbreeding.
B) genetic drift.
C) environmental stochasticity.
D) demographic stochasticity.