Final answer:
Windows Server 2008 shares the same code base with Windows Vista.
Step-by-step explanation:
The correct answer is B) Windows Vista.
Windows Server 2008 and Windows Vista share the same code base, which means they have a similar underlying structure and functionality. This allows for easier integration and compatibility between the two operating systems.
For example, both Windows Server 2008 and Windows Vista are based on the Windows NT 6.0 kernel, and they have similar user interfaces and networking capabilities.