One Reason Petrarch Was Important for the Renaissance Was Because

One reason Petrarch was important for the Renaissance was because:

A) he raised considerations of moral philosophy in his writings without subordinating them to religious belief.
B) he denounced St. Augustine, whose writings formed one of the great pillars of medieval civilization.
C) he was the first to write in Italian rather than Latin.
D) he championed law and the legal profession.