Like the grassy fields and old pastures that the upland sandpiper needs for feeding and nesting when it returns in May after wintering in the Argentine Pampas, the sandpipers vanishing in the northeastern United States is a result of residential and industrial development and of changes in farming practices.
A. the sandpipers vanishing in the northeastern United States is a result of residential and industrial development and of changes in
B. the bird itself is vanishing in the northeastern United States as a result of residential and industrial development and of changes in
C. that the birds themselves are vanishing in the northeastern United States is due to residential and industrial development and changes to
D. in the northeastern United States, sandpipers’ vanishing is due to residential and industrial development and to changes in
E. in the northeastern United States, the sandpipers’ vanishing, a result of residential and industrial development and changing
正确选项是B
我觉得本句的形式应该是like X，Y do 关键是分出那个是X，那个是Y，对于X来讲应该是：the grassy fields and old pastures，可是正确选项的B中主语是 the bird itself 啊，还是不对称啊。
请大家帮俺看看。 | 
