Refer to the exhibit

A Symmetrix is configured with two RDF groups, RDFG 1 and RDFG 2, as shown. The SRDF R1 devices used by Application 1(App 1) and Application 2 (App 2) are in RDFG 1. The SRDF devices used by Application 3 (App 3) are in RDFG 23

What should be created to enable SRDF/A for App 1 and App 2?

A.
Two device groups, one with the App 1 devices and another with the App 2 devices

B.
Two files, one with the App 1 devices and another with the App 2 devices

C.
One device group withthe entiredevice in RDFG1.

D.
One file with all the devices in RDFG 1 and RDFG 2