An administrator creates a new directory then shares it on the Windows server. The administrator sets the permissions for everyone to "Modify" but users report they are unable to create or delete documents. Which of the following is the cause？（）

• A、The administrator forgot to change the share permissions
• B、The users were not part of the “Everyone” built in group
• C、The administrator shared the files but not the folder
• D、“Modify” only allows users to change existing documents