Explanation
Plan driven approaches to business analysis practices most often use the formal type of communication. This means the communication of the actual requirements is in writing and often uses pre-defined forms requiring signatory approvals. All project documentation is normally archived as part of the project history.
Answer C is incorrect. Face-to-face is an effective communication method, but for plan-driven approaches,
formal communication is preferred in regard to requirements.
Answer B is incorrect. Ad hoc describes the sudden, quick conversations. This is an informal approach to
communication and isn't appropriate for a plan-driven business analysis approach.
Answer A is incorrect. Informal isn't preferred in a plan-driven approach.