About the description of the vulnerability scan, which of the following is wrong?

About the description of the vulnerability scan, which of the following is wrong?
A . Vulnerability Scan is a technology based on network remote monitoring target network or host security performance vulnerability, which can be used to simulate attack experiments and security audits.
B . Vulnerability scan is used to detect if the target host system has a vulnerability, generally a scan for a specific vulnerability for the target host
C . Vulnerability scan is a passive prevention measures to effectively avoid hacker attack behavior
D . Vulnerability scan can be used according to the results of ping scanning and port scanning

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Answer: C