What does a test execution tool primarily do?

A test execution tool is designed primarily to execute test cases and evaluate the actual outcomes against the expected results. This function is critical because it allows testers to verify that the software behaves as intended. By comparing actual outcomes to expected results, the tool assists in identifying any discrepancies, which could indicate defects or issues within the software. This evaluation process is central to testing, as it helps ensure that the application meets its specified requirements and functions correctly.

While monitoring overall test processes, creating detailed reports, and determining test levels are important aspects of software testing, they fall under different categories or functionalities. Monitoring the test process typically involves management tools or process management frameworks, reporting is often the purview of reporting tools or modules, and determining test levels is related to testing strategy rather than execution. Thus, the primary focus of a test execution tool is indeed to evaluate outcomes against expected results, making the correct answer B.