The tone of the author's discussion of the blues is ______.

A．French people were bound to the new machines.
B．France could not get free workers necessary to the industry.
C．The wealth of France was largely in the bands of new middle class.
D．France was more likely to produce goods in quantities.

A．were busy accumulating wealth through commerce and industry
B．could move from place to place as the need for workers arose
C．depended on farming for their living
D．had found a cheaper means of producing goods needed in qualities