フリー問題

問題文

A background job has to read the history of a channel the app is in and then post a summary as the app. Which pair does it use?

選択肢

1. Web API calls for both steps, with the credential issued for the app itself and the read permission limited to the conversations it belongs to.
2. An event subscription for the reading and a call for the posting, with the app's own credential and the read permission for its conversations.
3. Web API calls for both steps, with the credential issued for the whole application and the write permission for the whole organization.
4. Web API calls for both steps, with the credential issued for one person and the read permission limited to what they can see.