Sentence A declares that comments can turn a website into a democratic “polyphony”. Sentence C elaborates on this. Sentence B talks of the danger of “it” descending to cacophony if the language does not befit a “matured public sphere”. “It” here refers to the debates talked of in sentence C. Sentence D provides a solution to the problem addressed in sentence B. Moderators must retain the space for debate, while rejecting voices that breed cacophony. Correct Answer: ACBD
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