Answer:
a. deciphered by Champollion using the Rosetta Stone.
Step-by-step explanation:
Rosetta Stone is a granite fragment that was found in 1799 by French soldiers, in the city of Roseta located in Egypt. The stone has an extensive text, written in Egyptian hieroglyphics, which was partly deciphered by Champollion, being very important for understanding the origins of Egyptian writing and culture and language, becoming one of the most important historical fragments in the world.