单选题 Which of the following statements about manufacturing before 1870 can be inferred from the passage?______

A、 Most manufacturing, activity was highly organized
B、 Most manufacturing occurred in relatively small plants
C、 The most commonly manufactured goods were cotton presses
D、 Manufacturing and agriculture each made up about half of the nation's economy

【正确答案】 B

【答案解析】第三段第一、二句指出，自然，仍然有许多小车间，熟练的技术工人在这些车间中生产从报纸、橱柜到水管附件等产品。城市中有许多血汗工厂，成群的男女工人在住宅中计件生产衣服、雪茄。