OG上的一道RC求解答

何析洋UID：3635728

做了OG上一道阅读，有道题我自己实在想不明白，希望大家能指点指点
Whether the languages of the ancient American peoples were used for expressing abstract universal concepts can be clearly answered in the case of Nahuatl. Nahuatl, like Greek and German, is a language that allows the formation of extensive compounds. By the combination of radicals or semantic elements, single compound words 5 can express complex conceptual relations, often of an abstract universal character.

The tlamatinime (those who know) were able to use this rich stock of abstract terms to express the nuances of their thought. They also availed themselves of other forms of expression with metaphorical meaning, some probably original, some derived from Toltec coinages. Of these forms, the most characteristic in Nahuatl is the juxtaposition 10 of two words that, because they are synonyms, associated terms, or even contraries, complement each other to evoke one single idea. Used metaphorically, the juxtaposed terms connote specific or essential traits of the being they refer to, introducing a mode of poetry as an almost habitual form of expression.

Which of the following can be inferred from the passage regarding present-day research relating to Nahuatl?
A.Some record or evidence of the thought of the tlamatinime is available.
B.For at least some Nahuatl expressions, researchers are able to trace their derivation from another ancient American language.
C.Researchers believe that in Nahuatl, abstract universal concepts are always expressed metaphorically.

答案是A，B
我想不明白这个B，虽然文中提到some probably original, some derived from Toltec coinages，但我感觉文中没有信息暗示Toltec是ancient American language啊，虽然第一句话说了文章的主旨是在讨论languages of the ancient American peoples，但是tlamatinime不是已经扣题了么，说tlamatinime中的一些metaphorical meaning derive from一些其他的语言应该也不违背主旨吧？？我是不是想的有偏差啊，怎么想也想不明白