Can someone help me thanks

I think it’s A. Cause they produce the most copper compared to country A. And the other answers are talking abt country b producing More lead but that’s not true because country A produces more lead and and country A doesn’t have an a advantage in producing copper and lead because country B produces more copper than country A meaning they only have an advantage in producing more lead. And county a obviously doesn’t have an advantage for producing copper because country B produces copper in. In conclusion that’s what I think the answer is A