The switches shown in the exhibit form a TRILL region. The network administrator has enabled TRILL. What helps to ensure that Switch 2 sends multicasts and broadcasts over both of its switch-to-switch links?
A. Configure a switch to be the tree root bridge and allow the creation of multiple trees.
B. Configure Switch 3 and Switch 4 with the same designated routing bridge (DRB) priority.
C. Configure Switch 2 with multiple MSTP instances, which are mapped to TRILL access VLANs.
D. Configure Switch 2 to enable TRILL Equal Cost Multi-Path (ECMP) globally.