单项选择题
A system administrator wants to give full read/write/excute access to the owner and group of the /stuff directory and all subdirectories and files， but only allow read/execute for others. What command would the administrator use？（）
A.chmod -R 775 /stuff
B.chmod -h 002 /stuff
C.chmod -R 577 /stuff
D.chmod ug+rwx，o+rx /stuff
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