SAT语法句子提升题,

SAT语法句子提升题,When we were cleaning the garage,my sister and I found [the old soccer ball in the dark corner we used to play with when we were young.]A.(as it is now)B.in a dark corner from when we were young the old soccer ball we played withC.in a dark corner the old soccer ball we used to play with when we were youngD.the old soccer ball in a dark corner,we used to play with it when we were young.E.the old soccer ball,having played with it when we were young,in a dark corner.我的疑问在于C和E.我觉得两个好像都对,因为E里面逗号之间的插入语如果不看的话,剩下的部分还是构成一个完整的句子啊……C确实很靠谱但是我不明白为什么E是错的,还有请大致解释一下其他几个选项放入句子中句子的意思,