你會推薦使用哪些關鍵工具來加深使用者信任？

The correct answer is "資訊公開、安全性、控制權和實用性" (Transparency, Security, Control, and Utility) because these four pillars are fundamental to building user trust in privacy practices. Transparency means clearly communicating data practices. Security ensures data is protected from unauthorized access. Control empowers users to manage their data and privacy settings. Utility demonstrates that data collection provides a tangible benefit to the user, making the exchange worthwhile. "資料收集" (Data Collection) is not a trust-building tool itself; rather, how data is collected and used (transparently, securely, with user control, and for utility) determines trust. "跨網站 ID" (Cross-site ID) is a technology for tracking, which, without the other elements, can erode trust rather than build it. "個人化" (Personalization) is a result of data use, not a direct trust-building tool, and can be achieved in privacy-respecting or privacy-invasive ways.