Answer:
A). He continued his work to decipher more hieroglyphs on the Rosetta Stone.
Step-by-step explanation:
As per the descriptions provided in 'The Riddle of the Rosetta Stone,' the most reasonable prediction regarding Jean-François Champollion would be that 'he pursued his work to unravel more hieroglyphs on the Rosetta stone.' Eventually, he made progress in the upcoming years and prospered in identifying several phonetic hierogylphics signs which are employed in royal foreign names. He applied these signs later to the cartouches names discovered on the Rosetta stone. This cross-referencing technique helped him in developing a functioning hierogylphic alphabet. Thus, option A is the correct answer.