What should be checked first?

A report is stuck in the queued state. Verification has shown that email delivery is working, but the reports are still not received. What should be checked first?
A. If a manually generated report cannot be generated by the system and the subscription fails
B. If a manually generated report result can be sent as an email via the console
C. If the generated report is categorized as spam
D. If a manually generated report result can or cannot be downloaded