What do you need to create to test APIs on your SAP S/4HANA Cloud system using the SAP Business API Hub? Note: There are 2 correct answers to this question.

What do you need to create to test APIs on your SAP S/4HANA Cloud system using the SAP Business API Hub? Note: There are 2 correct answers to this question.
A . communication arrangement
B . An API
C . A communication system
D . A communication arrangement

Answer: C, D