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.