Based on those scopes, which TWO actions can the app perform in Slack?

Cristina is evaluating a Slack app’s security and notices that it has the following scopes present:

channels:write and chat:write:user.

Based on those scopes, which TWO actions can the app perform in Slack? (Choose two.)
A . Modify public channels
B . Upload files
C . Send messages as a member
D . Access group direct messages

Answer: AC