Which of the following is the best reason to complete an audit in a banking environment?

The best reason to complete an audit in a banking environment is due to regulatory requirements. Financial institutions are heavily regulated by government bodies (e.g., FDIC, OCC, Federal Reserve in the US) that mandate regular audits to ensure compliance with laws like SOX, GLBA, and PCI DSS. These regulations aim to protect consumer data, maintain financial stability, and prevent fraud. While organizational change, self-assessment, and service-level requirements can trigger audits, they are typically internal drivers or contractual obligations, whereas regulatory compliance is a fundamental and legally binding necessity for banks to operate.