According to the Article, what caused the giant panda population to decrease to the point that the species was listed as endangered? A.Nothing could be done to prevent a decline in the number of bamboo plants, a main food source for giant pandas. B.Noise from highway construction in China frightened the pandas and caused them to stop reproducing. C.There was deforestation of the pandas' natural habitat, and people were poaching the animals for their fur. D.The Wolong National Nature Reserve was set up for endangered species, but giant pandas did not have enough room there to establish a large population.
