第一遍OG11错了38个，第24题不明白

刚做了一遍OG11，错了38个，正确率72%，这算多吗？这个题不太明白，求大侠指点

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

答案是C，我是不明白为什么E不对，OG只说不定式不能做定语修饰，是因为逗号吗？

谢谢。。。

是的

是错得多还是因为逗号？哈哈！你的回答不明确。。。开玩笑啦。谢谢！