单选题：In bash，the command set is used __.

In bash，the command set is used __.@[C](1)
A. to run commands in a child shell
B. to use command history logs in a child shell
C. to set or display environment variables
D. to share out NFS partitions for other hosts




A.to run commands in a child shell
B.to use command history logs in a child shell
C.to set or display environment variables
D.to share out NFS partitions for other hosts


答案：C