I don't understand this question.

Most of the sardines I get come from Poland. I very seldom see Morroco listed on the tins that I get. I do not understand how an unstated price can infer origin, or species, or the presence of only binary choice.

My preference is learned: Of the mustard sardines I've had from China, all of them have been fucked up somehow. They're fucking gross. They wind up binned. They do not deserve another cent of my money.

Your unwarranted questioning of my food preference has been noted.

(Please note that I have not placed any pressure upon you to defend your own preferences.)