Exam AWS Certified Solutions Architect - Professional topic 1 question 673 discussion

A company uses AWS Organizations with a single OU named Production to manage multiple accounts. All accounts are members of the Production OU.
Administrators use deny list SCPs in the root of the organization to manage access to restricted services.
The company recently acquired a new business unit and invited the new unit's existing AWS account to the organization. Once onboarded, the administrators of the new business unit discovered that they are not able to update existing AWS Config rules to meet the company's policies.
Which option will allow administrators to make changes and continue to enforce the current policies without introducing additional long-term maintenance?