In the 1920s, assembly line production made it incredibly easy for Americans to access new consumer goods. Rising earnings gave more disposable income to be able to purchase the goods, as well as affordable automobiles and devices that people would need and want. Many people started living the desired life they wanted with affordable products. Advertising became as big as the industry they were representing because people paid more attention to the products they could generally afford. It was a head start during the industrial expansion.
I think the correct answer from the choices listed above is option 4. The refrigerator car is the invention which was most important in revolutionizing the meat industry. It <span>is a </span>refrigerated <span>boxcar, a piece of railroad rolling stock designed to carry perishable freight at specific temperatures.</span>
