B. The invention of the balance made trade easier. Increased trade contributed to the development of more complex writing systems.
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
mixed economy iswhat they have
