单选题A technician receives an urgent call that the switch in accounting is down. Which of the followingshould the technician do FIRST to troubleshoot this issue?（）AIdentity symptoms and problemsBDocument the process and solutionsCEstablish the most probable causeDEscalate if necessary.
单选题
A technician receives an urgent call that the switch in accounting is down. Which of the followingshould the technician do FIRST to troubleshoot this issue?（）
A
Identity symptoms and problems
B
Document the process and solutions
C
Establish the most probable cause
D
Escalate if necessary.
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