TOEFL Listening: TPO-TOEFL阅读TPO - 7NWJ4TPZ9S782G26N$

In paragraph 4, why does the author mention the association of tokens with farmers and artisans? A. To provide examples of the types of commercial activity that existed in Sumerian society B. To argue against the theory that writing was developed by an intellectual elite C. To contrast the way farmers used tokens with the way artisans used tokens D. To help explain why farmers and artisans had a relatively modest social status in Sumerian society