Which condition must be met before an NMS handles an SNMP trap from an agent?

Which condition must be met before an NMS handles an SNMP trap from an agent?

A. The NMS software must be loaded with the MIB associated with the trap. B. The NMS must be configured on the same router as the SNMP agent C. The NMS must receive a trap and an inform message from the SNMP agent within a configured interval D. The NMS must receive the same trap from two different SNMP agents to verify that it is reliable.