An alerting policy is expensive because it evaluates a very high-cardinality metric at raw granularity. Which change most directly follows Google Cloud guidance for lowering cost?

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C. Aggregate only to the level you need and avoid alerting on raw unaggregated data. Google's alerting cost guidance recommends aggregating only to the level you need and avoiding raw unaggregated data, because high cardinality drives many points returned. Splitting the alert into one policy per resource usually increases metric references and can cost more, not less.

An alerting policy is expensive because it evaluates a very high-cardinality metric at raw granularity. Which change most directly follows Google Cloud guidance for lowering cost?

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