What is a supported mode for disk based Cascaded SRDF?

A.
First leg – SRDF/S, Second leg – SRDF/A

B.
First leg – SRDF/A, Second leg – SRDF/A

C.
First leg – SRDF/S, Second leg – SRDF Adaptive Copy Write Pending Mode

D.
First leg – SRDF/S, Second leg – SRDF/S