Based on the riddle of the rosetta stone, what role did sylvestre de sacy play in jean-françois champollion’s career?

a de sacy gave champollion a job, which allowed him to earn a living while continuing to decipher the writings on the rosetta stone.
b de sacy taught champollion everything he knew, which allowed him to decipher the writings on the rosetta stone.
x champollion was inspired by de sacy, who had already successfully deciphered the writings on the rosetta stone.
d champollion studied with de sacy, who had already attempted to decipher the writings on the rosetta stone.