Which two options are two problems that Bridge Assurance can protect against? (Choose two)

Which two options are two problems that Bridge Assurance can protect against? (Choose two)
A . Ports being put into a root-inconsistent state.
B . The forwarding of data traffic after the spanning tree algorithm is stopped.
C . Slow convergence time after a topology change.
D . Unidirectional link failures.
E . BPDU flooding.

Answer: B D