Sentence Correction

Based on the Manhattan SC guide and various posts on forums, I understand that the following forms are correct for DISTINGUISH:
- DISTINGUISH X FROM Y
- DISTINGUISH BETWEEN X AND Y

However, I found that in OG12 #51, the correct answer actually contains a version of the 'DISTINGUISH' idiom that is incorrect according to all the sources I've looked at.

It's in the form of 'DISTINGUISH X AND Y'.

Here is the question:
A new study suggests that the conversational pace of everyday life may be so brisk it hampers the ability of some children for distinguishing discrete sounds and words and, the result is, to make sense of speech.

A) it hampers the ability of some children for distinguishing discrete sounds and words and, the result is, to make
B) that it hampers the ability of some children to distinguish discrete sounds and words and, as a result, to make
C) that it hampers the ability of some children to distinguish discrete sounds and words and, the result of this, they are unable to make
D) that it hampers the ability of some children to distinguish discrete sounds and words, and results in not making
E) as to hamper the ability of some children for distinguishing discrete sounds and words, resulting in being unable to make

OA: B

I know that the correct answer actually hinges more on another idiom (ABILITY OF X TO Y vs ABILITY OF X FOR Y), as well as on parallelism.

It seems that in the absence of the idiom 'DISTINGUISH BETWEEN X AND Y' in all the answer choices, parallelism trumps the idiom in this particular example.
Does it have anything to do with the fact that DISTINGUISH is in Infinitive form in this example?
Any expert care to shed some light onto this?