Which automation process could be used to accomplish this?

The Director of Customer Service wants to know when agents are overwhelmed with high-priority items in the support queue. The Director wants to receive a notification when a new case is open with the status of "New" for more than four business hours .

Which automation process could be used to accomplish this? Choose 2 answers
A . Escalation rules
B . Visual workflow
C . Lightning Process Builder
D . Scheduled Apex

Answer: A,C