What is contained in the probe of the return SYN/ACK packet when using enhanced auto-discovery (EAD)?

A.
4 bytes of notification

B.
10 bytes of TCP inner channel setup + 2 bytes of notification

C.
14 bytes of TCP inner channel setup + 4 bytes of notification

D.
18 bytes of TCP inner channel setup + 4 bytes of notification

E.
32 bytes of TCP inner channel setup + 2 bytes of notification