Which statement is true about a topology merge rule?

Specifies that the value of a resource field should be copied to the matchTokens field so that it can be used to merge events to resources

Merges two or more events together and relate them to the same topology resource

Specifies that the value of a resource field should be copied to the tags field so that it becomes searchable in the Ul

Specifies that two resources from different topology Observer jobs in fact refer to the same physical device