The correct option is B
The industrial revolution added to the serious consequences of the Second World War, brought with it the numerous emigration of inhabitants of the countryside to the industrial and commercial cities, leaving many rural populations, abandoned, depopulated, aged and also impoverished in many cases. A direct consequence of the industrial revolution in the field of agriculture was the development of agricultural machinery with cereal harvesting and threshing machines, moved since the 19th century by steam engines that were replaced by internal combustion engines in the 20th century , especially in its second part. Because of this, peasant labor was used in factories in large cities.
