You have a computer that runs Windows XP Professional. The computer has the following hardware installed: 3 GB page file, 2. 4 GHz processor, 2 GB of physical memory, 20 GB hard disk that has 1 GB of free space You need to enable hibernation support on the computer. What should you do first?（）

A. Upgrade the processor.
B. Add additional physical memory.
C. Increase the size of the page file.
D. Create additional free hard disk space.