Which statement is true for Fibre Channel QoS System Class?

Which statement is true for Fibre Channel QoS System Class?

A.
One can modify no-drop policy, and non FCoE traffic using natively the same class as
FCoE will be remarked to 0

B.
One cannot modify no-drop policy, and non FCoE traffic using natively the same class as
FCoE will be remarked to 0

C.
One can modify no-drop policy, and non FCoE traffic using natively the same class as
FCoE will not be remarked

D.
One cannot modify no-drop policy, and non FCoE traffic using natively the same class as
FCoE will not be remarked