Which of the following statements about special computing is incorrect?

Which of the following statements about special computing is incorrect?
A . Dedicated computing platforms mainly refer to mainframes and minicomputers.
B . Dedicated computing platforms mostly use RISC architecture
C . Dedicated computing platforms are expensive and have few applications. Only a few companies and a few applications can use computers.
D . Huawei’s KunLun minicomputer belongs to a closed computing architecture

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Answer: D