What statement is true?

A.
OAM cells are only used in VCCs and not VPCs

B.
F5 Flows are used in VPCs and F4 Flows in VCCs

C.
For F4 Floe cells, the PTI defines if segment or end-to-end

D.
For F4 Flow cells, the PTI defines that the cell is an OAM cell

E.
All of the above