使用 CAPI 进行转化追踪的四个必要条件是什么？请选择四个答案。

The four necessary conditions for conversion tracking with CAPI are: the method for sending conversion data (e.g., server-to-server API, partner integrations), the actual conversion data itself (details like event type, timestamp, user information), the ad account to which you want to attribute the conversions (linking the conversion to your advertising efforts), and the specific conversion type you wish to track (e.g., purchase, lead, sign-up). These elements ensure accurate data collection, proper attribution, and meaningful analysis. "Internal technical support" is often helpful but not strictly a necessary condition for CAPI functionality, as third-party solutions exist. "Ad groups with corresponding goals for each marketing funnel stage" describes a campaign strategy, not a prerequisite for CAPI's technical operation.