Scenario: A network engineer has created and bound an UDP-ECV monitor to identify the status of a UDP
service. However, no matter what the response is, the service is always marked as UP.
A possible cause of this behavior is that the network engineer __________. (Choose the correct option to
complete the sentence.)

A.
forgot to add a receive string

B.
added the string ns_true as receive string

C.
added a string that is invalid and thus skipped

D.
added a string that is always part of the UDP handshake