Regarding the description of the Fusion Compute memory multiplexing, which of the following is incorrect?

Regarding the description of the Fusion Compute memory multiplexing, which of the following is incorrect?
A . The memory multiplexing technology is enabled by default in the Fusion Compute system, and can only be disabled using the command line in the background
B . The memory switching technology is to transfer the data that has not been accessed for a long time in the memory to the hard disk, and then read it when needed
C . Memory sharing enables multiple virtual machines to share memory pages with the same data content
D . Memory multiplexing technology can reduce hardware procurement costs

Answer: A