Explanation is also there But i am unable to understand the explanation.
Here is the Explanation-
"The best choice is C. The phrase the more the children should be completed by a parallel phrase that begins
with a comparative adjective and a noun phrase, as in the greater their... advantage. Only C correctly
completes the structure with a parallel phrase. Choices A. B, D, and E present structures that are unwieldy and
awkward in addition to being nonparallel, and that state the relationship between language use and skills
development less clearly than C does. Also, underlaying in B and underlay in D are incorrect; the meaning of
this sentence requires the present participle of "underlie," underlying, as a modifier of skills."
Here is the Explanation-
"The best choice is C. The phrase the more the children should be completed by a parallel phrase that begins
with a comparative adjective and a noun phrase, as in the greater their... advantage. Only C correctly
completes the structure with a parallel phrase. Choices A. B, D, and E present structures that are unwieldy and
awkward in addition to being nonparallel, and that state the relationship between language use and skills
development less clearly than C does. Also, underlaying in B and underlay in D are incorrect; the meaning of
this sentence requires the present participle of "underlie," underlying, as a modifier of skills."