单选题The nice value is 60 in the ps listing. Which command is used to change this to a value of 20？（）A renice -n -20 {PID}B renice -n 20 {PID}C renice -n -40 {PID}D renice -n 40 {PID}
单选题
The nice value is 60 in the ps listing. Which command is used to change this to a value of 20？（）
A
renice -n -20 {PID}
B
renice -n 20 {PID}
C
renice -n -40 {PID}
D
renice -n 40 {PID}
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解析：
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