Which of the following statements about RISC instruction set architecture is incorrect?

Which of the following statements about RISC instruction set architecture is incorrect?
A . RISC assembly language programs generally require a large memory space, and the programs are complex and difficult to design when implementing special functions.
B . RISC CPU contains a rich set of circuit units, so it has strong functions, large area and high power consumption.
C . When implementing special functions on RISC machines, the efficiency may be low
D . RISC designers focus on frequently used instructions and try to make them simple and efficient.

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Answer: B