Every user’s home directory is located in the /export/home file system as
/export/home/<username>. The output from df -h shows the user’s home file system filling up: 
Which command would display disk usage by user?
A.
du -h /export/home
B.
df -k /export/home/*
C.
ls -lR /export/home
D.
du -sh /export/home/*
Explanation: