TOEFL Reading: ETS-TOEFL阅读机经 - R8K6185NP91W6ARBL$

The author mentions "Ancient Sumer" as an example of A. an unusual settlement that differed from the classic city-state B. a small farming village under the control of a large city C. a city-state consisting of a capital and outlying settlements D. a city-state that was particularly small in size for Mesopotamia