This was such a good quiz. It spanned the globe and was challenging, but you could logic your way to many of the answers. Just solid all around. Kudos, Quizmaster!!
The thing is, that distinction primarily applies to the spoken languages, not the written one. Written Chinese is basically identical in all dialects/sub-languages.
So, since we're explicitly referring to the written form here, I would imagine that just "Chinese" is actually the best answer, and Mandarin/Cantonese/Min/Hakka/whatever would be incorrect.
Not an expert here, though, so if someone knows more than me, please chime in!
However, that "major" modifier... it piqued my curiosity. Is it used because Moctezuma II was the last emperor before the war against the Spaniards?
So, since we're explicitly referring to the written form here, I would imagine that just "Chinese" is actually the best answer, and Mandarin/Cantonese/Min/Hakka/whatever would be incorrect.
Not an expert here, though, so if someone knows more than me, please chime in!