A stepwise approach to moving the MQ publish/subscribe environment to V7.0 has been taken to minimize the impact to the publish/subscribe applications using the environment. As part of this stepwise approach there will be a mix of V6 and V7 brokers running at any one time.
What additional step must be taken to allow for the coexistence of both versions of the brokers?

A.
Leave the broker’s queue manager defaults in place

B.
Enable the coexist flag on each broker’s queue manager in the broker domain

C.
Set the PSMODE parameter on the broker’s queue manager to COMPAT

D.
Set the coexistence parameter to true in each of the broker’s queue manager qm.ini file