A company would like to upgrade an old server to a multi-processor box. The server currently has a single 3.0GHz 1Mb cache processor in it with a single empty socket. The only processor that is available from a manufacturer is a 3.0GHz 2Mb cache model. Which of the following is the BEST reason why this upgrade will not work?（）

• A、The socket size does not match
• B、The cache is from a different manufacturer
• C、The processors do not match
• D、Processors cannot be upgraded after server has been deployed