. For members of the seventeenth-century Ashanti nation in Africa, animal-hide shields with wooden frames were essential items of military equipment, a method to protect warriors against enemy arrows and spears.
(A) a method to protect
(B)as a method protecting
(C) protecting
(D) as a protection of
(E) to protect
我的问题是:
如果把A选项的a method to protect改成methods of protecting 做同位语成分的话正确么?