What is the role of the workflow engine in SAP S/4HANA Cloud?

What is the role of the workflow engine in SAP S/4HANA Cloud?
A . To import workflows generated with third-party workflow toolsets
B. To generate alternative, simple workflows from complex, error-prone workflows
C. To run, control, and monitor all workflow-related activities in thesystem
D. To transform flow charts and graphics into executable workflows

Answer: C