I have never seen a slim person with a diet coke.
Probably BC if the person were slim:
1. They wouldn't be bothered and order real coke instead.
2. They don't drink coke.
When I was slim, I drank Diet Coke. I preferred the flavor of it over regular Coke. I still drink it, and I'm no longer slim. Still drink it for the taste.
Probably BC if the person were slim:
1. They wouldn't be bothered and order real coke instead.
2. They don't drink coke.