An advertiser is leveraging TikTok lead generation ads to build their own lead capture form on their e-commerce website. The web form they created was rejected by the TikTok ads review process. Which fields on their web form may have caused ad rejection?

The correct answer is Driver's license number. TikTok's advertising policies prohibit the collection of sensitive personal information, which includes government-issued identifiers like driver's license numbers, through lead generation forms. This is to protect user privacy and prevent potential misuse of highly sensitive data. Name, Country, and Product preference are generally acceptable fields for lead generation forms as they are considered standard demographic or preference-based information and do not pose the same privacy risks as collecting a driver's license number.