单选题
View the exhibit and examine the output. 
Which statement can be an inference from the output?（）
发布日期：2021-10-19
A
The FRA disk group has an asynchronous I/O bottleneck
B
The least number of I/Os are performed on the last data file in the list
C
The number of times that the backup or restore process directed the OS to wait until an I/O was complete is the highest for the last data file in the list
D
The number of times that the backup or restore process made an OS call to poll for I/O completion in Nonblocking mode is the least for the FRA disk group
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