To find out what is causing this problem, which log need to be checked?

A customer is running an Avaya Oceana® solution and the technical engineer is troubleshooting an operational issue. When they make a test voice call to Avaya Oceana®, it is not delivered to the available agents. During the isolation, the engineer found that the CSC TSAPI application is unable to receive CM events through AES.

To find out what is causing this problem, which log need to be checked?
A . CSC Service log- /var/log/Avaya/services/CallServerConnector/CallServerConnector.log PU logs- /var/ log/Avaya/dcm/CallServerConnectorService
B . CSC Service log- /var/log/Avaya/services/CallServerConnector/CallServerConnector.log PU logs- /var/ log/Avaya/dcm/pu/CallServerConnectorService
C . CSC Service log- /var/log/Avaya/services/CallServerConnector/CallServerConnector.log PU logs- /var/ log/Avaya/dcm/pu/pu.log
D . CSC Service log- /var/log/Avaya/services/CallServerConnector/CallServerConnector.log PU logs- /var/ log/Avaya/dcm/CallServerConnectorService

Answer: B