OG 39

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 protection

C) protecting

D) as a protection of

E) to protect

正确答案：C

OG 里面说protecting是分词修饰item, 说to protect不可以修饰item, why?

啊呀,不好意思,再仔细看了一遍解释,发现 OG的意思是protecting用来表示item的用途

是不是没有逗号的话E就对了呢?

noun不能用to do 修饰，这是我的理解