Explanation
Static analysis is the process of examining the work products of a software development or testing activity without executing them. Static analysis can be applied to various types of work products, such as requirements, design, code, test cases, etc. However, test plans are not suitable for static analysis, because they are high-level documents that describe the test objectives, scope, strategy, resources, schedule, and risks of a testing project. Test plans are not executable or formalized in a way that static analysis tools can analyze them.
Therefore, option A is the correct answer.
References: ISTQB Certified Tester Foundation Level Syllabus v4.01, Section 2.2.1, page 20; ISTQB Glossary v4.02, page 45.