Which description of the Cisco Enterprise Mobility Services Platform is true?

Which description of the Cisco Enterprise Mobility Services Platform is true?

A.
EMSP powers all Cisco CMX applications.

B.
EMSP is needed to support the deployment of Cisco CMX applications.

C.
EMSP supports cross-environment mobile app development and management.

D.
EMSP is needed to run the mobile services on which Cisco CMX applications depend.