Which of the following can be a reason for that?

You have configured the SLAs and their determination rules, but they are not derived in the service ticket.

Which of the following can be a reason for that? Note: There are 2 correct answers to this question.
A . The determination rules have been configured, but not activated.
B. The question related to SLAs must be activated in project scoping.
C. The system background job for SLA determination runs every 30 minutes and has not been executed yet.
D. A workflow rule has to be scheduled to trigger the determination.

Answer: A,B