Which of the following are prerequisites for flexible workflows for purchase order approval? (Choose three.)

[answerhappygod]

Which of the following are prerequisites for flexible workflows for purchase order approval? (Choose three.)

A. Deactivate the classic release procedure for purchase orders in customizing.
B. Define the recipients for the flexible workflow in the Manage Workflows for Purchase Orders SAP Fiori app.
C. Create a class with flexible workflow characteristics for purchase orders.
D. Set up the preconditions for the flexible workflow in the Manage Workflows for Purchase Orders SAP Fiori app.
E. Activate the flexible workflow for purchase orders in customizing.