According to the writer, China’s new middle class has emerged overnight.

A．were busy amassing wealth through commerce and industry
B．had found a cheaper means of producing goods needed in qualities
C．depended on industry for their living
D．were still bound to farming and couldn't move from one place to another easily

A．The demand for practical goods was unlimited.
B．Industrial Revolution was the result of the interaction of several factors.
C．French people depended on farming to develop industry and commerce.
D．Coal was very important to people's life.