Whose fault is it?

[Francis Asis]

You go to the freezer in the morning and find that the door has been open all night and all the food ruined because a bag strap had been shut in the door and it didn't close properly. Is it the fault of
A. The person who left their bag on top of the freezer
B. The person who went to the freezer last night and didn't check they had shut the door properly, or
C. Mum, because everything is mum's fault even though she isn't person A or B?

[tenrec]

Definitely the dog's fault.

[Dee Sa]

whenever I do silly things like that and dont discover until the next day [ freezer is in the shed] the inside is completely frozen over and the drawers wont open, have to get the hairdryer to defrost the drawers and all this takes ages and ages but the food is still "frozed".

[Francis Asis]

Thanks for the replies. After careful consideration I've decided its Dad's fault.