Shortly after World War II, John Jackson developed an idea for a machine lubricant that was superior to anything currently on the market. He persuaded friends to help him begin producing it for sale. While demand kept up with production at first, he soon found that he had to hire a sales force to sell excess product to manufacturing companies in the area. He decided this was primarily because of several strong competitors that had recently come into the industry. This is an example of marketing behavior that would occur during the era of U. S. business history.

This is an example of marketing behavior that would occur during the Sales era of U.S. business history.

Explanation:

Over the years, the principle of marketing has changed and constantly changes. Commercialisation has ostensibly developed through both classical and modern stages.

The era of rivalry was the era of sales. Companies can not market their mass produced goods easily anymore. The selling of products to consumers was becoming increasingly difficult for businesses. In this age, we see the marketing phenomenon as it emerges today. Companies had to encouraging and educating customers to sell products vigorously.

In these days, marketing is viewed in the United States, including the manufacturing period, the distribution age, the selling age and promotion, and is also a large functional field of the business.

answer'; i believe the correct answer is (15,000) workers a year are treated for injuries caused by jacks, lifts or jack stands;

im almost done gimme more time to get the answer