The answer would be : A. Appearance of literature in vernacular languages
Before the advancement, only the nobles and the scholar can enjoy the art of literature, since it was all written in Latin . In the middle ages, the literature started to be written in vernacular languages , which refer to the common tongue language and it become more accessible to he people
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This would be Archduke franz Ferdinand. I hope this helps!
Answer: i think it could be B or D
i'm probably wrong