Within a composite group, what happens to host writes for all devices when a TimeFinder consistent split is performed?

A.
I/O from the host is paused for a default of 5 milliseconds for all devices within the composite
group.
B.
I/O from the host is queued to internal server disk devices for all devices within the composite
group.
C.
I/O from the host is blocked until all devices in the composite group have completed their split
operation successfully.
D.
I/O from the host is stalled for all devices within the composite group until a restart command is
issued.