求助veritas一个语法题！求助一个关于过去分词修饰的语法题！

kykykykyno

今天在veritas里面遇到这个题，这里的解释说："anesthetized修饰的是 how the soldier sank into unconsciousness

但是我不记得过去分词有修饰整句的情况，怀疑自己是不是这块知识点忘记了，或者没完全了解到，就去查了资料，找了半天都没有解决。
求各位NN帮助，不知道是我理解的问题，还是这个题没对

Insufficiently trained for combat, the soldier was grievously injured in battle and sank once again into unconsciousness, anesthetized by the medicine required by the many rounds of surgery necessary to save his badly wounded leg.

A. abattle and sank once again into unconsciousness, anesthetized by

B. battle, sank once again into unconsciousness, and anesthetized

C. battle, sinking once again into unconsciousness, was anesthetized by

D. battle and sank once again into unconsciousness, and was anesthetized

E. battle, sinking once again into unconsciousness and being anesthetized by

答案给的是A给的解释如下

Strategically on this problem, you should identify that there are two verbs (or, more properly, "verbals") within the underlined portion ("sank" and "anesthetized"), and that there are up to two possible uses of the conjunction "and" in the answer choices. Your job, then, is to determine whether these verbs are part of a parallel list, or whether one (or more) is used as a participial modifier.

To do that, consider the meanings of the first two choices. In choice A, "anesthetized" is used as a modifier at the end of the sentence. For that meaning, the soldier has two verbs: was injured, and sank into unconsciousness. And the verb anesthetized describes how the soldier sank into unconsciousness.