You have an Azure subscription named Sub1 that contains an Azure Log Analytics workspace named LAW1.

You have an Azure subscription named Sub1 that contains an Azure Log Analytics workspace named LAW1.
You have 100 on-premises servers that run Windows Server 2012 R2 and Windows Server 2016. The servers connect to LAW1. LAW1 is configured to collect security-related performance counters from the connected servers.
You need to configure alerts based on the data collected by LAW1. The solution must meet the following requirements:
Alert rules must support dimensions.
The time it takes to generate an alert must be minimized.
Alert notifications must be generated only once when the alert is generated and once when the alert is resolved.
Which signal type should you use when you create the alert rules?
A. Log
B. Log (Saved Query)
C. Metric
D. Activity Log