Read this excerpt from the riddle of the rosetta stone. after graduating in 1807 from the upper school in grenoble, champollion went to paris. there he studied with sylvestre de sacy, the scholar who had attempted to decipher the writings on the rosetta stone a few years earlier. based on this excerpt, what is the best prediction that can be made? a. sylvestre de sacy provided the evidence that would decipher the writings. b. sylvestre de sacy grew tired after so many years of research and study c. sylvestre de sacy shared much of his previous research with champollion. d. sylvestre de sacy withheld some of his findings from champollion.