E.g. If Spain has 3 different goalscorers and Scotland has 1 from an own goal from a 4th Spanish player, which answer fits this role? Or if Spain has 3 different goalscorers and a clean sheet, "combined" is technically also correct, no?
Better to say, 3+ goalscorers and only 1 team to score, or 3+goalscorers and BTTS?
Basically, an own goal is a goal for the other team. So, if Spain wins 3-0 and goalscorers are Olmo, Morata and an own goal, that is 3 or more different goalscorers for Spain.
If Olmo scores and 2 different Scottish players score own goals, it's again 3 or more for Spain.
From your examples:
3 or more, combined
No, that is 3 from the same team.
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To be fair, when we initially worded the question we forgot the possibility of own goals so we added it later.
It would have been better if the answer had 'for' instead of 'from' (example - 1 or 2 different goalscorers, all for the same team).
Hopefully no own goals will be scored, eh?