Examine the image of black slaves working a machine that was published in Harpers Weekly in 1869. ...

Examine the image of black slaves working a machine that was published in Harpers Weekly in 1869. What development of the late-eighteenth century does the activity of the men in the image reflect?
 
  A) The machine is the cotton gin, reflecting the expansion of cotton and slavery after 1793.
  B) The machine is a shotgun, reflecting the practice of hunting by slaves on plantations.
  C) The machine is an automobile, reflecting the use of cars on plantations.
  D) The machine is a wheat grinder, reflecting the expansion of grain crops in the South.