Which criterion can be used only once in the IF section when customizing Tag Manager Activity rules?

Time Spent on Page" and "User's Browsing History" are criteria that can only be used once in the IF section of Tag Manager Activity rules. This is because these conditions typically represent a single, aggregate metric or a unique set of historical data that doesn't benefit from being evaluated multiple times within the same rule. For example, a user's total time on a page is a single value. "Clicked Element," however, can be used multiple times to specify different elements a user might click, allowing for more granular rule definitions based on various interactions.