One question - As per OG explanation, the problem with A is
1) ABILITY FOR -ING : idiomatically wrong
2) To <> and To <> : parallelism not there

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.

However I eliminated based on absence of "THAT" after "brisk" because it is not idiomatic.

Is this correct ?

A new study suggests that the conversational pace of everyday life may be so brisk it hampers...BLAH BLAH BLAH

or

A new study suggests that the conversational pace of everyday life may be so brisk THAT it hampers...BLAH BLAH BLAH

Bidisha800 wrote:replace lenthy phases with X and Y and we get :

.... ability of some children to distinguish X and to make Y

(B)

Why is it wrong: the two things ("hampers" and "results")
i.e. conversational pace "hampers" X and "results" in Y

Do you mean that the pace itself doesn't result in Y but it only hampers X? Is that why D is wrong?
Does the sentence actually should mean: the pace hampers the ability to X and, as a result, to Y?

Should it not be: "the pace hampers the ability to X, and to Y" instead of "the pace hampers the ability to X and, to Y" (as in option B)

I somehow mess everytime in sentences carrying "as a result/results/resulting in". I seem to agree with the explanation after selecting the wrong choice though. Do you have a tip or two to share here? Thanks a lot.

Bump. I have the same question below. Choice D reads That it HAMPERS blah blah, AND RESULTS blah blah. Why is this parallelism wrong? thanks

divineacclivity wrote:

Bidisha800 wrote:replace lenthy phases with X and Y and we get :

.... ability of some children to distinguish X and to make Y

(B)

Why is it wrong: the two things ("hampers" and "results")
i.e. conversational pace "hampers" X and "results" in Y

Do you mean that the pace itself doesn't result in Y but it only hampers X? Is that why D is wrong?
Does the sentence actually should mean: the pace hampers the ability to X and, as a result, to Y?

Should it not be: "the pace hampers the ability to X, and to Y" instead of "the pace hampers the ability to X and, to Y" (as in option B)

I somehow mess everytime in sentences carrying "as a result/results/resulting in". I seem to agree with the explanation after selecting the wrong choice though. Do you have a tip or two to share here? Thanks a lot.

Experts, please reply.