Which of the following BEST describes a directory traversal attack?

Which of the following BEST describes a directory traversal attack?

A.
A malicious user can insert a known pattern of symbols in a URL to access a file in another section of the directory.

B.
A malicious user can change permissions or lock out user access from a webroot directory or subdirectories.

C.
A malicious user can delete a file or directory in the webroot directory or subdirectories.

D.
A malicious user can redirect a user to another website across the Internet.