Which switch would you use?

You are introducing a Brocade VCS Fabric to your network and would like to implement
Fibre Channel using the same switch. Which switch would you use?

A.
Brocade VDX 6710

B.
Brocade VDX 6720

C.
Brocade VDX 6730

D.
Brocade VDX 8770