The verified answer is B. A port security violation can place a switchport into the err-disabled state. In shutdown violation mode, the switch disables the interface to stop unauthorized MAC address use. Cisco CCNA 200-301 v1.1 places this skill in Network Access, where the exam expects a working understanding of how the feature behaves on real Cisco networks, not just a memorized command. Latency, an administratively shut interface, or an unplugged cable do not describe the err-disable trigger in the question. In production, this distinction matters because a misapplied command or design choice usually creates an outage, a security gap, or unnecessary troubleshooting noise. The correct choice matches the control-plane, data-plane, wireless, security, or services behaviour described in the scenario and should be preferred over options that merely sound related.
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