When does the passage suggest that ancient Egyptian hieroglypttic script. was finally deci

When does the passage suggest that ancient Egyptian hieroglypttic script. was finally deciphered？

A．At around the same time as cuneiform. script. was deciphered

B．Shortly before the Rosetta stone was unearthed

C．As soon as additional bilingual inscriptions became available to scholars

D．A few decades after the hieratic script. was decoded

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