TOEFL Reading: ETS-TOEFL阅读机经 - 45ZTMN17IJGFYSNKL$

According to paragraph 5, which of the following was true of Sumerian writing during the period of greater freedom of enterprise? A. Knowledge of it was limited to the temple-centered administration. B. It was used for purposes beyond those for which it was first created. C. It was used primarily to help keep the traditional leadership in power. D. It led to further technological developments by 2800 B.C.