a new study suggests that the conventional pace of every day 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.

answer is B: that it hampers the ability of some children to distinguish discrete sounds and words and, as a result, to make

i select D: that it hampers the ability of some children to distinguish discrete sounds and words and, results in not makeing

why?

B:It hampers the ability of sb to do sth, as a result, to do sth

ability的惯用法