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.