Use the following excerpt to answer the questions.
“Archaeologists believe that the Maya left their cities sometime between 800 and 900 CE. It’s possible this event happened over just a few decades. Until the 900s, the Maya kept careful historical records. They used their hieroglyphs to carve names and dates on pyramids and temples. Then in the 900s, the writing mysteriously stopped. The temples and pyramids began to fall into disrepair.”
What is the claim in this paragraph?