Read the quote

and while the law of competition may be sometimes hard for the individual, it is best for the race, because it ensures the survival of the fittest in every department - am carnegie
what does the quote reveal about the industrial revolution ?

a) working-class laborers favored laissez-faire policies to increase their wages.
b) industrialists used social darwinism to justify their tough business practices
c) governments that favored socialist principles passed high protective tariffs

Industrialists used social Darwinism to justify their tough business practices.

Explanation:

Social Darwinism is the term which is popularly accepted in America. It means that the society which evolves, adapts and thrives is considered to be successful and the same factors contribute for the decline too. Disparities between the individuals and races is justified because some are more to survive than others similarly during industrialization, a company which was able to survive the laws of competition faced enormous profits whereas which is unable evolve and adapt faced the defeat.  

Laissez faire and free enterprise system was the economic provisions which promoted industrial success for the entrepreneurs.

it's not the readmission