Problem: The prairie chicken once is widely seen in many areas across the Great Plains. Due to the conversion of prairie land into farmland, one species of prairie chicken became extinct. The only species of prairie chicken left are endangered mainly because of habitat loss. They require tall grass prairies as their habitat. Which of the following is the best explanation for their endangered state?
A. The prairie chickens lack genetic diversity and resilience to changes in the environment, resulting decline of the population
B. Environmental perturbations increased the rate of adaptive alleles.
C. The prairie chickens have adapted to many new environments
D. The prairie chickens are genetically diverse and resilient to environmental perturbations