Which statement is true about RSTP topology changes?

Which statement is true about RSTP topology changes?

A.
Any change in the state of the port generates a TC BPDU

B.
Only noedge ports moving to the forwarding state generate a TC BPDU

C.
If either an edge port or a nonedge port moves toa block state, then a TC BPDU is generated

D.
Only edge ports moving to the blocking state generate a TC BPDU

E.
Any loss of connectivity generates a TC BPDU