单项选择题
Bob, a user, reports that his computer is running slower since he viewed an online training
presentation. Bob is also receiving an increased amount of spam email.
Which of the following is the MOST likely cause of Bob’s issue?（）
A. Virus
B. Worm
C. Network bandwidth
D. Malware
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A. Least privilege
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Bob, a technician, wants to run antivirus scans on every machine on a daily basis. To minimize the impact to all system resources, which of the following is the BEST time to schedule the scans to run?（）
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