In Giblin’s view, which group’s initial determination helped solve the mystery of the Rosetta Stone?

In Giblin's view, Greek's initial determination helped solve the mystery of Rosetta Stone

Explanation:

Back when Greek rulers were ruling over Egypt, they faced a massive problem of language. The rulers couldn't understand the language of people, and the people couldn't understand the language of rulers.

Without Rosetta Stone, we wouldn't know anything about ancient Egyptians. It was written in two languages, Egyptian and Greek. The Greek inscription provided a key to decode Egyptian language

the answer is a).

the answer can be "credo" it means to believe = the word credo means "an official statement of beliefs"