A network monitoring system uses SNMP polling to record the statistics of router interfaces. The SNMP queries work as expected until an engineer installs a new interface and reloads the router. After this action, all SNMP queries for the router fail. What is the cause of this issue?

A. The SNMP interface index changed after reboot. B. The SNMP server traps are disabled for the link state. C. The SNMP server traps are disabled for the interface index. D. The SNMP community is configured incorrectly.