Which are the reasons RSTP converges faster than STP? (Multiple choices)

Which are the reasons RSTP converges faster than STP? (Multiple choices)
A . The concept of an edge port was introduced in RST
B . An edge port does not receive processing configuration BPDUs and does not participate in RSTP operations. It can change from Disable to Forwarding state.
C . If one of the root ports in the network fails, the optimal alternate port in the network will become the root port and enter the Forwarding state.
D . In RSTP, after a port is elected as a designated port, it first enters the Discarding state, and then quickly enters the Forwarding state through the Proposal/Agreement mechanism.
E . When a port receives an RST BPDU from an upstream designated bridge in RSTP, the port compares the stored RST BPDU with the received RST BPD
G . If a designated port in the network fails, the optimal alternate port in the network becomes the designated port and enters the Forwarding state.

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Answer: ABCD