TOEFL Reading: ETS-TOEFL阅读机经 - T36_768Z5889J756L$

In paragraph 3, why does the author provide the information about an Antwerp silk weaver's costs in 1583? A. To describe some typical costs in the silk-weaving industry B. To support the statement that artisans' main expense was materials, not equipment C. To argue against the view that artisans did not have to borrow money to buy equipment D. To show that materials were cheap and plentiful for most artisans