【单项选择题】
To examine the Exhibit， press the Exhibit button. While a user is compiling a C program， "vmstat 120 10" is run to determine the cause of a performance problem.  Given the vmstat output as shown in the exhibit， which of the following conclusions should be drawn about the I/O bottleneck？（）<br /> <img src="https://img.ppkao.com/2018-08/xiashuhui/2018080211042520016.jpg" /><p> To examine the Exhibit， press the Exhibit button. While a user is compiling a C program， "vmstat 120 10" is run to determine the cause of a performance problem.  Given the vmstat output&en
A、A. There is a file I/O bottleneck.
B、B. There are too many open files.
C、C. There appears to be a buffer shortage.
D、D. There is a paging space I/O bottleneck.
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