Among the big data computing tasks, which of the following description of IO-intensive tasks is wrong?

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Among the big data computing tasks, which of the following description of IO-intensive tasks is wrong?
A . During the execution of IO-intensive tasks, most of the time is spent on IO
B. By improving network transmission efficiency and read-write efficiency, performance can be greatly improved
C. High CPU consumption
D. The more tasks, the higher the CPU efficiency

Answer: C