曼哈顿模考题求问

1998JIN

Bo Jackson, who is widely believed to be both one of the greatest athletes of all time and the first player to make an all-star team in baseball and football, leaves a legacy that will likely live on for generations to come.

       
Bo Jackson, who is widely believed to be both one of the greatest athletes of all time and the first player to make an all-star team in baseball and football, leaves a legacy that
       
Bo Jackson, widely believed to be one of the greatest athletes of all time, was the first player to make an all-star team in both baseball and football, and he leaves a legacy
       
The first player to make an all-star team in baseball and football, Bo Jackson, widely believed to be one of the greatest athletes of all time, leaves a legacy that
       
Widely believed to be one of the greatest athletes of all time, Bo Jackson, who was the first player to make an all-star team in baseball and football, and leaves a legacy that

Since he is the first player to make an all-star team in both baseball and football and is widely believed to be one of the greatest athletes of all time, Bo Jackson’s legacy







OA:C
求问E 哪里错了？（虽然觉得E很奇怪，指代啊，还有意思上加了一个因果关系）
答案说since 是一个open modifier 因此后面主语不应该是 Bo Jackson’s legacy而应该是 Bo Jackson
我怎么从来没听说过这个东西。。。since引导的不就是从句吗？

BeatGmatCan

E错在Since从句里的he指代不明。he应该对应一个人名，但后面的主语是Boxxx’s legacy.