The step that would accomplish the objective of testing management's identification and prioritization of critical data collected by the organization is to document and test a data inventory and classification program by determining the data classification levels and framework. This involves verifying that management has established a comprehensive data inventory and that data classification processes are in place and effectively implemented. It ensures that data is appropriately categorized based on its criticality and sensitivity, aligning with the organization's risk management framework and data governance policies.
Reference: IIA's Global Technology Audit Guide (GTAG) on Data Privacy and Protection, which outlines best practices for data classification and management.