What are the steps necessary to trace SIP messages going through the Avaya Session Border Controller for Enterprise (SBCE)?

What are the steps necessary to trace SIP messages going through the Avaya Session Border Controller for Enterprise (SBCE)?
A . Login to the EMS using a web browser, then access Device specific settings > Troubleshooting > Tracing, and click on Start traceSB
C . Login to the active Avaya Session Border Controller for Enterprise (SBCE) using SSH port 22, issue the su C root command, and then execute the traceSBC command.
D . Login to the EMS using port SSH 222, issue the sudo su command, and then execute the traceSBC command.
E . Login to the active Avaya Session Border Controller for Enterprise (SBCE) using SSH port 222, issue the sudo su command, and then execute the traceSBC command.

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Answer: A