命令 kill 9 的含义是。
A: killstheprocesswhosePIDis9.
B: killsallprocessesbelongingtoUID9.
C: sendsSIGKILLtotheprocesswhosePIDis9.
D: sendsSIGTERMtotheprocesswhosePIDIS9.
A: killstheprocesswhosePIDis9.
B: killsallprocessesbelongingtoUID9.
C: sendsSIGKILLtotheprocesswhosePIDis9.
D: sendsSIGTERMtotheprocesswhosePIDIS9.