Final answer:
The best arrangement for a conclusion paragraph is option C: C, A, B, D.
Step-by-step explanation:
The best arrangement for a conclusion paragraph is option C: C, A, B, D. In a conclusion paragraph, it is important to restate the main points and provide a final thought or call to action. Sentence C effectively summarizes the main argument that children should not be allowed to use social media. Sentence A provides supporting points about the negative effects on social skills and homework. Sentence B adds another negative consequence, making children vulnerable to predators. Finally, sentence D offers a practical suggestion for parents. This arrangement creates a logical flow and a strong concluding message.
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