Which attribute applies to a Process Activity?

In the COBIT 5 Process Reference Model, processes are composed of practices, which are in turn composed of activities. For a process to be effective, roles and responsibilities for its execution must be clearly defined. This is typically done using a RACI (Responsible, Accountable, Consulted, Informed) chart at the process practice level. Since activities are the detailed actions that implement a practice, they inherently operate within this structure of clear roles and responsibilities.

A. This phrase describes the purpose of the overall process, not a single, more granular activity within it.
C. COBIT 5 is a non-prescriptive framework; it defines what should be done, not the specific, prescriptive steps on how to do it.
D. This is the definition of a management practice, which is a higher-level component in the process model than an activity.

ISACA, COBIT 5: Enabling Processes (2012), Chapter 2, The COBIT 5 Process Reference Model, p. 13.

ISACA, COBIT 5: A Business Framework for the Governance and Management of Enterprise IT (2012), Appendix C: Detailed COBIT 5 Process Reference Model, p. 51.