Which design element should an engineer consider when multicast is included in a Cisco SD-Access architecture?

Which design element should an engineer consider when multicast is included in a Cisco SD-Access architecture?

A. PIM SSM must run in the underlay. B. Multicast clients reside in the underlay, and the multicast source is outside the fabric or in the overlay. C. Rendezvous points must be used in a PIM SSM deployment. D. Multicast traffic is transported in the overlay and the EID space for wired and wireless clients.