Answer:
A. Giotto
Explanation:
Giorgio Vasari was an Italian painter born July 30, 1511 and is mostly famous for his "Lives of the Most Excellent Painters, Sculptors, and Architects" which is a series of biographies. According to my research on Giorgio Vasari, I can say that based on the information provided within the question he gave the credit to Giotto di Bondone an italian painter from Florence, Italy.
I hope this answered your question. If you have any more questions feel free to ask away at Brainly.