An SRDF source, R1 volume, is paired concurrently with an SRDF R2 volume (Target A) and another R2 volume (Target B). Which combination of SRDF modes is NOT permitted between the two pairs?

A.
One pair in Synchronous mode; the other pair in Semi-Synchronous mode.

B.
One pair in Synchronous mode; the other pair in Synchronous mode with a secondary mode of Adaptive Copy Disk.

C.
One pair in Synchronous mode; the other pair in Synchronous mode.

D.
One pair in Synchronous mode; the other pair in Synchronous mode with a secondary mode of Adaptive Copy Write Pending.