Read the passage about the Rosetta Stone. A large, heavy package arrived at the scholars’ palace in Cairo. When they opened it, they found it contained a black stoned slab covered with writing in three different scripts. A note from a French army officer was inside the package saying that the stone had been unearthed in an old fort near the town of Rosetta, thirty-five miles north of Alexandria, Egypt. French soldiers were tearing down a ruined wall in the fort when they came upon the slab.

–The Riddle of the Rosetta Stone,
James Cross Giblin

Which organizational pattern best describes this passage?

chronological order
problem and solution
cause and effect
comparison and contrast