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Passage: As more students attend classes online, cybersecurity experts warn that children are increasingly exposed to scams, inappropriate content, and strangers posing as classmates. Simple precautions, such as using strong passwords, avoiding public Wi-Fi for schoolwork, and never sharing personal details with unknown contacts, can significantly reduce these risks. Parents are also encouraged to monitor screen time without being overly intrusive. Question: What is the main idea of the passage?
A. Online learning brings cyber risks to children that can be reduced with simple precautions ✅
B. Public Wi-Fi is completely safe for schoolwork
C. Online classes should be banned for children
D. Parents should constantly monitor every message their child sends
