File size limits is the correct answer because sensitive information types are defined by the content patterns and contextual signals rather than by the size of a file.

Sensitive information types rely on pattern matching and contextual rules and they commonly use constructs such as Regular expressions, Keyword lists, and Confidence levels to identify data. A size threshold does not describe the data pattern itself so File size limits is not a typical criterion for defining a sensitive information type.

Confidence levels are used to indicate how strongly a detection matches a sensitive type and they let administrators tune thresholds to reduce false positives. That makes this option a commonly used element and not the correct choice in this question.

Regular expressions provide precise pattern matching for structured data such as credit card numbers and social security numbers. They are a primary method to define sensitive information types so this option is not correct.

Keyword lists let you match specific words or phrases that indicate sensitive content and they are commonly used for phrase based detections. That is why this option is not the correct answer.

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