What does an installation package generally contain?

An installation package typically encompasses all modified or created source versions pertinent to the given release. This means that any changes, enhancements, or new features that have been introduced during the development cycle are included within the package. The reason this is the most accurate choice is that an installation package serves as a comprehensive bundle that integrates all necessary components required for correct deployment and operation of software. This includes both newly developed functionalities as well as any adjustments to existing code, ensuring that users have access to the complete and updated software environment.

Other options suggest a limited scope. For instance, stating that the package contains only new software features or only bug fixes omits crucial elements such as existing functionalities that may have been modified. Regarding user documentation, while it is certainly valuable for end-users, it is not the core content of an installation package, which primarily focuses on the software itself. Hence, the comprehensive nature of option B best encapsulates what an installation package generally encompasses.