一道独立主格的经典题目但是始终有点问题 还请大神讲解

sunyuwei

Visitors to the park have often looked up into the leafy canopy and saw monkeys sleeping on the branches, whose arms and legs hang like socks on a clothesline.
A. saw monkeys sleeping on the branches, whose arms and legs hang
B. saw monkeys sleeping on the branches, whose arms and legs were hanging
C. saw monkeys sleeping on the branches, with arms and legs hanging
D. seen monkeys sleeping on the branches, with arms and legs hanging
E. seen monkeys sleeping on the branches, whose arms and legs have hung


这貌似真的是已经看了几万遍的一句话 但是我仔细看真的还是存在一点问题 麻烦亲们解答一下
我搜了一些独立主格的解释，with 作为状语修饰前面分句，那么逻辑主语应该是前面分句的主语，可是前面分句的主语是visitor

sunyuwei

顶。。。。。