Memory is one of the important components in the computer. Which statement about the definition of memory is wrong?

Memory is one of the important components in the computer. Which statement about the definition of memory is wrong?
A . Memory is relative to external memory, and its main feature is fast access speed.
B . Memory is also called internal memory. Its function is to back up, copy and permanently store the calculation data in the CPU to improve the reliability of the data.
C . Memory, also called main memory, is a storage space that can be directly addressed by the CPU and is made of semiconductor devices.
D . When the computer is running, the CPU will transfer the data that needs to be calculated into the memory for calculation. When the calculation is completed, the CPU will send the results out. The operation of the memory also determines the stable operation of the computer.

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Answer: B