问一个PREP语法笔记有关中心词的问题

dyjzcy12

195. (GWD-7-Q13)

Like the grassy fieldsand old pastures that the upland sandpiper needs for feeding and nesting whenit returns in May after wintering in the Argentine Pampas, the sandpipersvanishing in the northeastern United States is a result of residential andindustrial development and of changes in farming practices.

A.    the sandpipers vanishing in the northeastern United States is a resultof residential and industrial development and of changes in

B.    the bird itself is vanishing in the northeastern United States as aresult of residential and industrial development and of changes in

C.    that the birds themselves are vanishing in the northeastern UnitedStates is due to residential and industrial development and changes to

D.     in the northeasternUnited States, sandpipers’ vanishing is due to residential and industrialdevelopment and to changes in          (B)

E.     in the northeasternUnited States, the sandpipers’ vanishing, a result of residential andindustrial development and changing

选项分析：
A. the sandpipers vanishing的中心词是sandipipers不是一个result，vanishing只是修饰语，且sandipipers与后面的is主谓不一致


求教，如果让vanishing作中心词，是不是写成sandpipers'vanishing的形式还是vanishing of the sandpipers的形式？  

菜农人民

帮顶

elisepoon

求NN解答....