I want to know the answer to the following question:
What language is Florentine Tuscan based on?
All the background I'm provided with is that "Dante's Florentine-Tuscan literary Italian thus became the language of the literate and upper class in Italy, and it spread throughout the peninsula as the lingua franca among the Italian educated class as well as Italian traveling merchants.". Is that enough to answer the question?
Answer: no