No one seems to read my post as to why E is incorrect and then are unnecessarily wasting their precious preparation time in getting confused
There is a concise and well written grammar rule that tells us exactly why E is wrong and i have explained the same rule in great detail in my earlier post.
I will explain it again here by pasting my earlier post as well as throwing more light on the rule.
The correct answer is D
E is blatantly wrong because of the rules of comma (bet you don't know that )
I am sure Gmat would never hinge a correct answer only based on commas, there would be more mistakes in a wrong option apart from an incorrect comma
SO the rule of comma, states that a phrase bound by commas is akin to a parenthetical element
Meaning, if there is a phrase in between two commas, then treat that particular phrase as if it is inside a bracket. For all practical purposes, such a phrase conveys non essential or additional information - information that is not of great importance to the reader.
SO Option E is essential saying :-
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.
Now in essence the sentence can be read as:-
As a baby emerges from the darkness of the womb would be rated about 20/500.
This is an absurd sentence with no regard for grammar rules.
We need the phrase "IT"S RUDIMENTARY SENSE OF VISION" as well as "which would deemed legally blind for an adult" because these two phrases tells us that the baby is blind in legal terms. These two phrases are important to grasp the full meaning of the sentence and hence cannot be bound by commas.
Hence E IS WRONG
MORE EXPLANATION ABOUT THE RULE
Use a pair of commas in the middle of a sentence to set off clauses, phrases, and words that are
not essential to the meaning of the sentence. Use one comma before to indicate the beginning of the pause and one at the end to indicate the end of the pause.
Here are some clues to help you decide whether the sentence element is essential:
If you leave out the clause, phrase, or word, does the sentence still make sense?
Does the clause, phrase, or word interrupt the flow of words in the original sentence?
If you move the element to a different position in the sentence, does the sentence still make sense?
If you answer "NO" to one or more of these questions, then the element in question is Essential and should NOT EVER be set off with commas like it is done in option E here.
Here are some example sentences with nonessential elements in which we can easily remove the phrase and it will still make complete sense as far as the meaning of the sentence is concerned.
Clause: That Tuesday,
which happens to be my birthday, is the only day when I am available to meet.
Phrase: This restaurant has an exciting atmosphere. The food,
on the other hand, is rather bland.
Word: I appreciate your hard work. In this case,
however, you seem to have over-exerted yourself.
THIS IS THE ONE AND ONLY REASON WHY E IS WRONG