Establishing a specialized internal team dedicated to the workout of delinquent or defaulted accounts, with structured and independent oversight, would significantly enhance the bank's ability to manage high-risk situations. This policy would ensure a focused and expert approach to dealing with problematic loans, providing the necessary resources and expertise to evaluate and address each case effectively. Structured and independent oversight ensures that the workout process is consistent, fair, and aligned with the bank's broader credit risk management objectives.

A is incorrect because outsourcing the management of high-risk accounts to external consultants might not provide the same level of understanding and commitment to the bank's specific policies and client relationships as an internal team would.

B is incorrect because while a dynamic credit limit system can be part of the solution, it does not address the need for direct management and workout of accounts that have already become problematic.

D is incorrect because taking immediate legal action against all delinquent borrowers can be unnecessarily aggressive and might not always be in the best interest of the bank, especially in terms of maintaining customer relationships and reputation.