What are your options if an out-of-the-box integration between SAP S/4HANA Cloud and another SAP solution is NOT available? Note: There are 2 correct answers to this question.

What are your options if an out-of-the-box integration between SAP S/4HANA Cloud and another SAP solution is NOT available? Note: There are 2 correct answers to this question.
A . Infrastructure as a Service
B. Integration tools
C. Unrestricted firewall
D. Custom CDS Views

Answer: A,D