D is the correct choice
A & C - both do not resolve the issue of ambiguity (i.e. who are we referring to in the second half - the parents or the children?)
B, D, E remain
D is chosen because "Studies of test scores show that watching television has a markedly positive effect on childrenwhose parents speak English as a second language, as comparedto those whose parents are native English speakers." - Parallelism and removes ambiguity
Hope this helps!
...
A & C - both do not resolve the issue of ambiguity (i.e. who are we referring to in the second half - the parents or the children?)
B, D, E remain
D is chosen because "Studies of test scores show that watching television has a markedly positive effect on childrenwhose parents speak English as a second language, as comparedto those whose parents are native English speakers." - Parallelism and removes ambiguity
Hope this helps!
...
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