Comprehensive and Detailed Step-by-Step Explanation: Astress testevaluates system performance under extreme conditions, such as high user loads, to determine how the system behaves under peak traffic or resource exhaustion. * Stress Testing (Correct Answer - A) * Identifies performance bottlenecks in software applications. * Helps ensure the ERP system can handle expected workloads. * Example:Simulating thousands of concurrent users accessing the ERP system to test response times and server load capacity. * Parallel Testing (Incorrect - B) * Compares a new system with an old one but does not test system performance under load. * Regression Testing (Incorrect - C) * Tests whether recent code changes have affected existing functionality but does not focus on performance. * Interface Testing (Incorrect - D) * Checks interactions between system components but does not measure performance. References: * ISACA CISA Review Manual * COBIT 2019: Performance and Capacity Planning * NIST 800-37 (Risk Management Framework)