In a test plan, you would be most likely to find software requirements. A test plan typically outlines the overall testing strategy, objectives, resources, schedule, and specific requirements that need to be fulfilled. It is essential for the testing team to understand the software requirements to ensure that the testing processes align with what the software is intended to accomplish.
Trace tables are often used during testing to track the execution of code and verify its correctness, but they are not typically included in a test plan itself. Test data is important for executing tests but is usually described separately or prepared as part of the test environment setup rather than being a primary component of the test plan. Logic errors refer to bugs that may be found during testing and are the subject of testing outcomes rather than a component of a test plan.