You upgrade a network from STP to RSTP to improve the reconvergence time. When a link or port
in the network fails, the network reconvergence is improved. However, the reconvergence time
when the Root Bridge node fails shows no improvement.
Why does this happen?

A.
Most of the RSTP traffic passes through the Root Bridge, so it takes longer to recover the
network load.

B.
The RSTP process to elect a new Root Bridge is the same as STP.

C.
The RSTP Root Bridge is no longer listening, so the other switches stop forwarding.

D.
The RSTP BPDUs are no longer being sent out to the network from the Root Bridge.