Implementing Cisco IP Switched Networks (SWITCH v2-0) (#333)

Which statement is true about RSTP topology changes?

Any change in the state of the port generates a TC BPDU.
Only nonedge ports moving to the forwarding state generate a TC BPDU.
If either an edge port or a nonedge port moves to a block state, then a TC BPDU is generated.
Only edge ports moving to the blocking state generate a TC BPDU.
Any loss of connectivity generates a TC BPDU.