Unix - Engineering

Q1:

Which of the following commands is used to remove files with confirmation prompt from the user file system which have neither been accessed nor modified i the last one year?

A find -mtime +365 | rm

B grep (/usr/*) - mtime + 365 | -ok rm

C find -name - mtime + 365 / - ok rm

D find /user/* \(-mtime + 365 - a - atime +365 \) - OK rm {} \;

E None of the above

ANS:D - find /user/* \(-mtime + 365 - a - atime +365 \) - OK rm {} \;

And /usr/* I think it refers to the user file system.

But I don't understand \(-mtime + 365 - a - atime +365 ).

And logically the pipe must be used in this case.