what happens after undeployment completes?

Composite A has two versions deployed lo the SOA runtime. Version 2.0 is the default
revision, and Version 1.0 is an earlier (but active) revision. Version 2.0 has 100 instances in
the Running state also hits 50 instances that are waiting for a callback on a mid-process <
receiver> within a BPEL component in the composite. You undeploy Version 2.0. Which
statement describes what happens after undeployment completes?

A.
All running instances immediately go stale, but the callbacks are processed by
Version 1.0.

B.
All running Instances and the callbacks are allowed to complete on Version 1.0, but
all new requests are served by Version 1.0.

C.
All running Instances are allowed to complete, the callbacks fail after undeployment
and all new requests ate served by Version 1.0.

D.
All running instances immediately go stale, including the instances that are awaiting
callbacks on the mid process <receive>.