The answer is (2) a rise in the standard living. This is becasue with indusrialization came the use of technology, the application of science and new scientific discoveries, which permited to enhance living conditions and comfort for an extended group of people. Machineries produced in mass and the articles for comfort could reach more people. Regarding the othe options, social classes did not dissapear, it appeared classes related with the industrial work and capitalism; the birth rate did not increase because in the cities the families were smaller than in the rural places; and the urban tenements (houses) increased.
