求指教一道语法题~~

As a baby emerges from the darkness of the womb with a rudimentary sense of vision, it would be rated about 20/500, or legally blind if it were an adult with such vision.
(A) As a baby emerges from the darkness of the womb with a rudimentary sense of vision, it would be rated about 20/500, or legally blind if it were an adult with such vision.
(B) A baby emerges from the darkness of the womb with a rudimentary sense of vision that would be rated about 20/500, or legally blind as an adult.
(C) As a baby emerges from the darkness of the womb, its rudimentary sense of vision would be rated about 20/500; qualifying it to be legally blind if an adult.
(D) A baby emerges from the darkness of the womb with a rudimentary sense of vision that would be rated about 20/500; an adult with such vision would be deemed legally blind.
(E) As a baby emerges from the darkness of the womb, its rudimentary sense of vision, which would deemed legally blind for an adult, would be rated about 20/500.

正确答案是D,我选的是E。

1）E可能在意思上强调了would be rated about 20/500，而没有强调would deemed legally blind for an adult，但是在语法上有什么错误吗？
2）D我觉得很奇怪，A baby..with a rudimentary sense of vision that would be rated about 20/500...这里的would be rated about 20/500应该是用来修饰sense of vision的而不是a baby的吧，那么这句话的前半句简化来说就是A baby emerges from the darkness of the womb with a rudimentary sense of vision。这句话不是一个fragment吗？实在不能理解，求牛牛解释。