Which best explains why the industrial revolution led to a larger middle class?

Factories created enormous job opportunities and the workers were paid a lot.

Explanation:

Many  businesses and factories were established. As a result if which there were huge job opportunities for the middle class people. They earned a lot and they improved their living conditions. Middle class grew in size and population. Working class gradually got shifted to the next level in the society and the middle class population became large in number.

As the middle class workers started to earn a lot they took advantage  of different amenities and they were happy that they  could afford it. They lived  in a furnished dwelling and purchased clothes and saw to that they lived a comfortable life. Education of children were also possible.

labor leaders and organizations had the power to demand it.

explanation:

workers got a five-day workweek because the bcea protects and respect the rights of the employees. labor leaders and other groups demanded it.

the first forms of writing came from them in the form of pictographs around 3100 bc.