Final answer:
Static analysis tools are most suitable for developers as they analyze source code for errors and vulnerabilities before compilation, making them a development-focused tool.
Step-by-step explanation:
The test tool that is most suitable for developers rather than testers is C. Static analysis tools. Static analysis tools are used by developers to analyze source code before it is compiled, to find potential errors and security vulnerabilities. These tools can also help in enforcing coding standards and detecting code smells, which makes them an essential part of the development process, rather than the testing phase. While testers can use static analysis reports, the tools themselves are generally used in the earlier stages of software development, thereby making them more suitable for developers. Meanwhile, testers are more likely to focus on dynamic testing tools like performance testing tools to evaluate the behavior of running software.