How is change approved for implementation in Smart Workflow?

How is change approved for implementation in Smart Workflow?
A . The change is submitted for approval and is automatically installed by the approver once Approve is clicked
B . The change is submitted for approval and is automatically installed by the original submitter the next time he logs in after approval of the 3nge
C . The change is submitted for approval and is manually installed by the original submitter the next time he logs in after approval of the change.
D . The change is submitted for approval and is manually installed by the approver once Approve is clicked

Answer: C