What are two potential drawbacks of VPLS? (Choose two)

What are two potential drawbacks of VPLS? (Choose two)
A . VPLS requires manual configuration for loop prevention
B . VPLS is poorly suited for large, flat network implementations.
C . VPLS increases the risk of routing loops
D . When more sites are added to the VPLS, packet replication is significantly increased.
E . VPLS devices drop all VLAN-tagged packets

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Answer: BD