Over time, the first Americans spread out across the land. In the Southwest, the Anasazi built elaborate caves into the face of cliffs. These caves are still visible today. Around 3,300 years ago, tens of thousands of Anasazi mysteriously deserted their cliff dwellings. Their descendants (Hopi, Zuni and others) are now known as the Pueblo tribes. In the Mississippi area, the Mississippi people became known as mound builders because of the large platform mounds they constructed for their temples. According to this passage, the Pueblo tribes A abandoned their settlements to join the Anasazi. B destroyed their settlements before leaving the Southwest. C descended from the Anasazi. D left no evidence of their settlements.