The method that allowed goods to be produced in greater quantities at lower cost to the consumer was:

Mass production

Explanation:

Mass production also known as continuous production refers to the production of goods in large quantities utilizing specialised equipments for the production process.

Producing products in large quantities leads to a decrease in the cost of the product. Mass production leads to an increase in productivity as workers manufacture a large number of products under a lesser period of time.

Mass production requires low labour cost thereby reducing the expenditure of the company.

Mass production