But what did the passages in Egyptian mean? Did they contain exactly the same message as the Greek passage? The last sentence of the Greek text said, "This decree shall be inscribed on a stela [slab] of hard stone in sacred [hieroglyphic] and native [demotic] and Greek characters," so it seemed clear that the inscription was the same in all three languages. That way, the priests' statement could be read by Egyptians who understood Greek, as well as by those who knew only one or both of the Egyptian languages. But the scholars were still far from being able to decipher either the hieroglyphs or the demotic writing.

—The Riddle of the Rosetta Stone,
James Cross Giblin

What signal word helps readers identify evidence of a cause-and-effect relationship in the passage? a shall b so c but d both

It was an important discovery because they would be able to compare the inscription they could translate with the hieroglyphs. This ability would allow them to find the hieroglyphs that meant the same thing as the words they knew

Explanation:

The Rosetta Stone was studied by Jean-François Champollion, who was responsible for translating it successfully. The stone, discovered in 1799, contains the same text, a decree issued in Memphis, written in ancient Greek and in two Egyptian writings -- demotic and hieroglyphic. Until then, hieroglyphs were a true mystery, since the ability to read them had been lost. Scholars were, however, able to read the ancient Greek part, and it said that the decree was to be written in the three languages. They realized they had a precious key in their hands, one that would allow them to translate hieroglyphs for the first time.

i hope this helped'

d ) power this is the right answer