What is the most important factor when deciding whether or not to select a proprietary...

Theprimary considerationin selecting any AI system, especially aproprietary model, is itsfit for business purpose. Whether it serves the intended goals is foundational before evaluating technical or governance features.

From theAI Governance in Practice Report 2024:

“AI governance starts with defining the corporate strategy for AI… and aligning systems with business purpose and operational context.” (p. 11)

B, C, Dare relevant for evaluation, but onlyafterconfirming business applicability.