After World War II, consumers were able to make purchase decisions based more on their wants and desires than necessity. As a result, more companies discovered the benefits of

A) personal selling.
B) economies of scale.
C) marketing.
D) mass customization.
E) online shopping.

With consumers having a choice to make purchase decisions based on their wants and desires rather than just necessity, companies had to start promoting their products in ways that would appeal to these desires. This is where marketing comes in, as companies can create campaigns that generate interest and desire for their products, thus increasing sales. Personal selling and economies of scale were important before and after World War II, but marketing became more essential in the post-war period. Mass customization and online shopping are more recent developments that were not significant during the post-war boom.