According to the sequence of events described in The Riddle of the Rosetta Stone, what leads the scholars to believe that the three inscriptions say the same thing in different languages?

the discovery of the Rosetta Stone by soldiers
the letter sent by the army officer to the scholars
the appearance of the ancient Egyptian hieroglyphs
the translation of the last sentence of the Greek text

What was one reason that southern states passed laws after 1800 to discourage manumission? 1)southern whites feared that freed blacks would seek revenge for past treatment as slaves. 2) northern leaders pressured southerners to liberate enslaved people. 3)southern states needed an inexpensive labor force to work in southern factories. 4)northern whites had sold their slaves to southerners before slavery was banned in the north.