Avaya currently uses the online tool called Avaya Diagnostic Methodology (ADM) for partners to raise trouble tickets and

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Avaya currently uses the online tool called Avaya Diagnostic Methodology (ADM) for partners to raise trouble tickets and receive assistance, and expects customers/partners to have performed the following tasks before raising a trouble ticket.
1. Clearly stated the problem.
2. Detailed the findings.
3. Clarified the problem.
When they receive the trouble ticket, what is the next step in the diagnostic methodology that Avaya Tier 3 support will perform?

A. Identify a patch to fix the problem.
B. Update the Knowledge Management database.
C. Implement a solution.
D. Determine the cause.