How could the administrator troubleshoot this?

Universal Containers has a process to allow an employee to submit a vacation request and route it to the employee’s manager for approval. An employee attempted to submit a request but it could not be submitted.

How could the administrator troubleshoot this?
A . Ensure the user record has an assigned active manager.
B . Use workflow to email the administrator if the process fails.
C . Review the system log to determine the root cause.
D . Ensure the approval step has an associated action

Answer: A