单选题After successfully testing a probable cause to an issue， which of the following is the NEXT troubleshooting step？（）AImplement the solution or escalate.BPerform a root cause analysis.CEstablish a plan of action to resolve the problem.DVerify full system functionality and if applicable implement preventative measures.
单选题
After successfully testing a probable cause to an issue， which of the following is the NEXT troubleshooting step？（）
A
Implement the solution or escalate.
B
Perform a root cause analysis.
C
Establish a plan of action to resolve the problem.
D
Verify full system functionality and if applicable implement preventative measures.
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