The Carolina Parakeet, Endemic to the Southern U

The Carolina parakeet, endemic to the southern U.S. became extinct by 1920 because

A) the birds ate fruit and grain crops so farmers killed the birds as part of a pest management program.
B) poachers captured the birds to sell in the commercial market.
C) a category 5 hurricane destroyed the bird's natural habitat.
D) the introduced Asian tiger mosquito carried avian flu to the bird population and wiped it out.
E) human produced acid precipitation and climate warming degraded the birds' habitat.