What does Moshi need to do to ensure that John won't have access to Slack?

What does Moshi need to do to ensure that John won’t have access to Slack?

Moshi is a Workspace Owner on the Plus plan. John is leaving the company on Friday, and Moshi will be deactivating John’s IdP account.

What does Moshi need to do to ensure that John won’t have access to Slack?
A . Change the email, and reset the password. Changing the email will end John’s Slack session.
B . Deactivating the IdP account will automatically delete the Slack account that was bound to it via SSO.
C . Check that the IdP supports de-provisioning via SCIM and that the connector app is installed and configured correctly.
D . Activate "Just-in-Time" de-activations to automatically remove John and any users who are inactivate for more than 14 days.

Answer: C