Which coding practice involves following a specific set of coding rules within a software company?

The correct choice refers to the concept of "house style," which encompasses the specific set of coding standards and guidelines adopted by a software company. These guidelines dictate how code should be written, formatted, and organized to ensure consistency across the team's work.

Adhering to a house style promotes better readability and maintainability of code, allowing multiple developers to easily understand and collaborate on each other's work. This is especially crucial in large teams or projects, where inconsistency in coding practices can lead to confusion and errors.

In contrast, refactoring involves reorganizing and improving existing code without changing its external behavior, focusing primarily on enhancing performance and clarity rather than adhering to a specific coding style. Documentation is the practice of writing notes and explanations about the code and its functionality, which supports understanding but does not dictate coding format itself. Version control is a system that tracks changes to code over time, enabling collaboration and change management, but it does not concern itself with the specific rules of coding style.

Thus, the concept of house style is pivotal for ensuring consistency and clarity in code, making it the correct answer in this context.