You are the network administrator for your company. All network servers run Windows Server 2003. A server named Server1 hosts applications for network users. Server1 contains a motherboard that can support two CPUs. One CPU is currently installed. Server1 has 512 MB of RAM and a single 36-GB integrated device electronics (IDE) hard disk. It has a 10 Mb Ethernet card connected to a 10/100 Mb switch. After Server1 is in use for five months, network users report unnacceptable response times on their applications. You open System Monitor on Server1 and see the information shown in the following table. You need to improve the performance of Server1. What should you do? （）
- A Add an additional CPU.
- B Add an additional 512 MB of RAM.
- C Replace the existing hard disk with a faster one.
- D Replace the 10-Mb Ethernet card with a 100-Mb Ethernet card.