OG12-30现在分词作状语没有修饰逻辑主语？？？

sana21

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

答案自然是C，但是OG的官方解释是说：现在分词开头的状语从句修饰主句的Items，
为什么修饰的不是主语shields而是items？
那岂不是说状语从句的逻辑主语可以不？、与主句一致么？？

不明白 ，请NN们解释一下

谢谢咯

grogr

我也有相同的疑问！！
protecting warriors against enemy arrows and spears应该指animal-hide shields 啊
不是所有essential items of military equipment都是protecting warriors against enemy arrows and spears
比如弓箭长矛神马的？……

nickddss

逻辑主语是动作的发出者。
animal-hide shield是一个物体，自身不能发出动作。所以不能作为protecting的逻辑主语。