大全987-61。关于“after”的题

orchid347

61.    After crude oil, natural gas is the United States second biggest fuel source and supplied almost exclusively from reserves in North America.
(A) After crude oil, natural gas is the United States second biggest fuel source and supplied almost exclusively from reserves in North America.
(B) Natural gas, after crude oil the United States second biggest fuel source, supplied almost exclusively from reserves in North America.
(C) Being supplied almost exclusively from reserves in North America, natural gas, the United States second biggest fuel source after crude oil.
(D) Natural gas, the United States’ second biggest fuel source after crude oil, is supplied almost exclusively from reserves in North America.
(E) Natural gas is supplied almost exclusively from reserves in North America, being the United States’ second biggest fuel source after crude oil.
想请问为什么A不可以，我觉得没什么硬伤的~
多谢大家指教啊

cecilia199004

【United States second biggest fuel source】这里有问题吧

我觉得【the United States’ second biggest fuel source】这样对~