What security precautions must be taken when creating a directory into which files can be uploaded anonymously using FTP?

What security precautions must be taken when creating a directory into which files can be uploaded anonymously using

FTP?

A.
The directory must not have the execute permission set.

B.
The directory must not have the read permission set.

C.
The directory must not have the read or execute permission set.

D.
The directory must not have the write permission set.

E.
The directory must not contain other directories.