Which two features would be used on the Brocade VDX to meet this requirement?

You are connecting an existing Ethernet network to a Brocade VCS Fabric. You want to
prevent any Layer 2 loops from forming. Which two features would be used on the Brocade
VDX to meet this requirement? (Choose two.)

A.
RSTP

B.
PVST

C.
BLDP

D.
ELD