A composite group spanning two Symmetrix arrays is set up to run SRDF/Star using Cascaded SRDF as shown in the exhibit.
What is one of the necessary conditions before an MSC cycle switch is performed at Site B?

A.
Transmission of delta sets from Site B to Site C has finished

B.
SDDF bitmaps have been swapped at Site A

C.
Invalid track count between Sites A and C must be under 30000

D.
SYMCLI_STAR_ALLOW_CASCADED_CONFIGURATION option must be enabled in the option file