Which two statements about STP are true? (Choose two)

Which two statements about STP are true? (Choose two)
A . To support load-balancing across redundant paths, the VAN-to-instance mapping must match on all
B . switches in each path
C . MST configurations are propagated throughout the VTP domain
D . Only one version of STP can be active on a device at one time
E . Rapid PVST+ and MST can be active on a device simultaneously
F . MST supports up to four MST instances, including instance 0

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Answer: A , C