PMD supports multiple programming languages but is primarily used for which types of coding languages?

The primary use of PMD, which is a static code analysis tool, is to analyze source code for potential bugs, code smells, and security vulnerabilities, particularly in object-oriented programming languages. Apex and Java are the main languages that PMD supports, as it was specifically designed with them in mind due to their widespread use in enterprise applications and Salesforce development.

Java is one of the most popular and widely used programming languages, and using PMD helps maintain high code quality by enforcing coding standards and best practices. Apex, being a proprietary language specifically designed for Salesforce, also benefits significantly from PMD's functionalities, helping developers to write cleaner and more maintainable code in the Salesforce ecosystem.

Other programming languages listed, such as C++, Python, JavaScript, Ruby, HTML, and CSS, while they may have their own tools for static analysis, are not the primary focus of PMD. PMD's strengths lie in its comprehensive ruleset tailored for Java and Apex, making option B the correct choice.