On a node CI, the System Availability KPI status is Critical. What could cause it to be Critical?
A. An event with the Node Status indicator set to a state with a Critical status is resolved to a node CI.
B. An event with a severity of Critical and not assigned is resolved to a node CI.
C. An event with a System Availability KPI set to a state with a Critical status is resolved to a node CI.
D. An event with a severity of Critical and not resolved or closed is resolved to a node CI.