'Code' only matches 'style' in this context. There are many games around the world called 'football' and these different types are called 'codes'. Association football is a code of football. This is the one Americans refer to as 'soccer' (but it's also called 'soccer' in other places too). Other codes include: Rugby football (union and league) American football Australian rules football The dominant code in any region is always just referred to as 'football'.

Native english speaker here (American) I've never heard of that, and and would have no idea how to answer the question.

T mur, then would you say that B was correct? "in any order"?

It's mostly a sporting expression, meaning under the code or set of rules of a given sport