An internal auditor conducts a data privacy audit engagement.

Internet protocol addresses are commonly treated as personal information because they can identify, locate, or be linked to an individual user, device, account, or household when combined with other data. In a privacy audit, internal auditors should treat IP addresses as sensitive because they may reveal browsing activity, access locations, system usage, and user behavior. Behavioral information and mobile device identifiers can also be sensitive in certain contexts, but the most broadly recognized answer is IP addresses. Device type alone is usually less specific and may not identify a person without other data. Internal auditors should evaluate whether personal information is classified, protected, retained properly, and processed according to privacy requirements. Therefore, Option B is correct.