In Performance Optimization of the N8500 Clustered NAS Storage Systems

In performance optimization of the N8500 clustered NAS storage systems, the top command is runand the following output is displayed: top - 01: 06: 48 up 1: 22, 1 user, load average: 0.06, 0.60, 0.48 Tasks: 29 total, 1 running, 28 sleeping, 0 stopped, 0 zombie Cpu(s) : 0.3% us, 1.0% sy, 0.0% ni, 98.7% id, 0.0% wa, 0.0% hi, 0.0% si Mem: 191272k total, 173656k used, 17616k free, 22052k buffers Swap: 192772k total, 0k used, 192772k free, 123988k cached Which of the following statements is incorrect?

A) up 1:22 indicates the current system time.
B) load average indicates the average length of task queues.
C) 0.3% us in Cpu(s) indicates the CPU occupation percentage of user space.
D) 17616k free in Mem indicates the total capacity of free memory.