Which of the following situations is an example of mass production?
a. a banker works long shifts to earn extra money for the holidays.
b. an artist carves wooden statues to sell to tourists on the street.
c. a farmer tends a very large field to grow a wide variety of crops.
d. a factory employs many workers doing different jobs to produce cars.

D. A factory employs many workers doing different jobs to produce cars

Explanation: The situation that is an example of mass production is A factory employs many workers doing different jobs to produce cars. Mass production is the manufacture of large quantities of standardized products. In the 1920s, industrialization pioneer Henry Ford developed mass production techniques as the assembly line which reduced the production costs. Besides, these plants could manufacture hundreds of cars per day.  

there are no mutiple choices here

following type of cultural development caused people to want and buy new products on the market :