Which of these was used to decipher ancient Egyptian writing?

Question

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The Rosetta Stone, discovered in 1799, was essential in deciphering ancient Egyptian hieroglyphics. It contained a decree issued at Memphis in 196 BC in three scripts: Greek, hieroglyphic, and demotic. The Greek text was known, and by translating it along with the other two scripts, scholars were able to decipher the hieroglyphics. The Narmer palette and Pyramid of Khefren are artifacts that provide information about ancient Egyptian culture, while the Sphinx is a statue with symbolic and religious significance.

Which of These Was Used to Decipher Ancient Egyptian Writing