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.

1. it hampers the ability of some children for distinguishing discrete sounds and words and, the result is, to make

2. that it hampers the ability of some children to distinguish discrete sounds and words and, as a result, to make

3. that it hampers the ability of some children to distinguish discrete sounds and words and, the result of this, they are unable to make

4. that it hampers the ability of some children to distinguish discrete sounds and words, and results in not making

5. as to hamper the ability of some children for distinguishing discrete sounds and words, resulting in being unable to make

给的答案是b，但连意思都说不通阿。而d多么工整呀。大伙儿说呢？

B是对的.

D后面的are unable to 和前面的hamper重复.