The primary goal of corrective controls in financial systems is to ensure that errors do not propagate across interconnected systems. Financial transactions are often interdependent, meaning one incorrect or unauthorized change can affect multiple systems. Regulations often mandate these controls to maintain accuracy and prevent cascading failures. A (insider threats altering banking details) is a concern, but this scenario focuses on corrective controls, not insider threats specifically. C (business insurance) is unrelated to why corrective controls are implemented. D (preventing unauthorized changes) falls under preventive, not corrective controls. Reference: CompTIA Security+ SY0-701 Official Study Guide, Security Program Management and Oversight domain.