What does this indicate on the computer?

While searching through a computer under investigation, you discover numerous files that appear to have had the first letter of the file name replaced by the hex code byte 5h.

What does this indicate on the computer?

A.
The files have been marked as hidden

B.
The files have been marked for deletion

C.
The files are corrupt and cannot be recovered

D.
The files have been marked as read-only