None of the above choices .It might be because she does have better things to do .It might be because she does n't have anything better to do .It might be because she does have time to kill doing other things .
Why might waiting for the mail be her daily routines ?
Putting aside the sound , I found the vent near her window , which she daily looked out upon to stalk the postman 's arrival . Awaiting the mail was another one of her routine activities . My dad walked in , as he always does . " Did you find it ?