u/Other-Description262

https://preview.redd.it/f4wgb4a9z5bh1.png?width=943&format=png&auto=webp&s=4f3d1425df7181c9a634e40d069d17c17876f35f

I've struggled a lot with this question. Some teachers solve it as A while others choose B for different reasons but I think that both options are stupid. Doesn't choosing A imply that me remembering not locking the door was the reason we were robbed? And choosing B imply that I didn't lock the door deliberately? I'm not a native English speaker so I would like to know how you guys would solve this