TOEFL Reading: ETS-TOEFL阅读机经 - 1153LGG71FY69425L$

What can be inferred from paragraph 3 about local materials? A. They were of higher quality than imported materials. B. They were usually more plentiful than imported materials. C. They remained available even after merchants began to control the industries. D. They tended to be more affordable than materials supplied by merchants.