Florentine Became the Standard Form of Modern Italian Language

Florentine became the standard form of modern Italian language:

A) as Italian humanists never wrote their literary works in Latin.
B) with the popularization of the dialect through literary texts like Dante's Divine Comedy.
C) as Italian humanists rejected the ancient cultures of Greece and Rome.
D) because Petrarch condemned the use of Florentine as a written language.