Which of the following reduce the prices of higher-cost products, such as automobiles, for consumers in the 1920s. installment plans the introductions of coupons assembly lines the development of advertisements

assembly lines

An assembly line is a manufacturing process in which products are moved from one station to the next, with specific components being added at each stage until the product is completed. This method is significantly faster and cheaper than traditional assembly. The system is often associated with Henry Ford, who used it, along with interchangeable parts, to assemble his cars. This lowered the prices of goods and made cars accessible to the general population.

the right answer is the end of world war ii

after the end of a global wwii all the nations involved, in an attempt to create an organization to maintain world peace. this agreement would work settling international disputes via negotiation and arbitration instead of leading the issues escalate to another war.