Which statement regarding Content Cards removal is true?

The correct statement regarding Content Cards removal is that Content Cards can be removed when the app sends an event. This means that the application has the capability to programmatically control the visibility of Content Cards based on certain triggers or actions.

For instance, the app might decide to remove a Content Card in response to user behavior, another event in the app, or based on backend updates. This functionality allows greater flexibility in managing user engagement and can enhance the overall user experience by ensuring that only relevant or timely content is displayed.

The other options suggest limitations that are not accurate. For instance, the idea that Content Cards can only be removed by user interaction would imply a lack of control from the app itself, which is not the case. While user interaction can trigger removal, it isn't the only way. Furthermore, the notion that Content Cards are permanent until the next app update contradicts their dynamic nature, as they can be removed or updated independently of app updates. Lastly, the claim that Content Cards cannot be removed once displayed overlooks the possibility of programmatically managing their lifecycle through events, which directly allows for their removal at any point as needed.