Final answer:
Cuneiform tablets are the kind of documents most commonly found in Mesopotamian writings, inscribed with a reed stylus into clay and used for a variety of records.
Step-by-step explanation:
A kind of document frequently encountered in the writings recovered in Mesopotamia is a. Cuneiform tablets. These clay tablets were inscribed with cuneiform script, which began as symbols or pictographs and evolved into a sophisticated writing system. Mesopotamians used a reed stylus to press into wet clay to create documents. These tablets served various purposes, including documenting commercial exchanges like contracts and receipts, as well as recording laws, religious texts, and daily activities. They became very durable once baked, and their durability has allowed many of them to survive to the present day, providing invaluable insights into Mesopotamian society.