A system is experiencing performance problems.  After checking the CPU usage, the problem identified is that the system is "CPU Bound".  Which of the following outcomes will determine if there is a possible CPU constraint?（）

A. iostat disk1 1 
B. iostat -d disk1 2 
C. iostat disk2 1 
D. iostat -d disk2 2

A. Total amount of Ticks used by all users 
B. Total amount of Ticks used by all processes 
C. Total amount of Ticks used by a specific user 
D. Total amount of Ticks used by a specific type of process

A. vmstat 
B. fileplace 
C. iostat 
D. lvmstat