Answer:
They reduced trade with European countries.
Explanation:
The destruction, the first world war brought to the United States changed its stance towards Europe in the following period which evident from the U.S foreign policies. They reduced trade withe European national and focused on the domestic issues. They saw the second world war as a European war and therefore took a neutral stance towards it.
Sedimentary rocks form beneath the surface of the earth. 
Mummified fossils are commonly found in cold climates. 
<em>[ They are formed when remains are buried rapidly in dry cold or hot environments ]</em>
No not really it was sad though :\
Answer:
The Sales Era.
Explanation:
The Sales era was the era that began after the production era. The sales era, in the marketing, was the era in which the companies began producing goods in mass volume. It was an era of unorganized market where companies were competing with each other significantly, Selling of mass products became difficult. New marketing strategies emerged because of this to persuade customers to buy their products.
The era that is defined in the question refers to the sales era.
So, the correct answer is the Sales era.