How is multicast traffic managed in a Cisco ACI fabric?
A. FTag trees are rooted at the spine nodes. Cisco APIC determines the roots.
B. FTag trees are rooted at the leaf nodes. Cisco APIC determines the roots.
C. FTag trees are rooted at the leaf nodes. The roots must be configured manually.
D. FTag trees are rooted at the spine nodes. The roots must be configured manually.