以下哪种方法可以在top中按内存占用情况由高到低对进程排序?
A. Within top, type o and then select mem.
B. Within top, press f, scroll to %MEM, press s to select, and then press q to quit.
C. Within top, press S and then select %MEM.
D. Within top, press Shift+S, select %MEM, then press q to quit.