单项选择题

A. schedtune -hB. schedtune -rC. vmtune -fD. schedtune ……

A system has users doing interactive work while background jobs are running. Interactive users are requesting that system response time be improved for foreground processes. Which tuning parameters should be changed to accomplish this？（）

A. schedtune -h
B. schedtune -r
C. vmtune -f
D. schedtune -w

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