Answer:
A. the frame-story structure
Explanation:
In Tim O'Brien's "Ambush," the element that directly enhances the theme of the past's imprint on the present is the frame-story structure.
A frame story is a type of narrative that is done to accommodate a second story and in this scenario, O'Brien is asked by his daughter whether he's taken a life before of which a second story forms where he recalls the war and his role in it.
(I took this from ahsan57900)
1. The governments and economies of foreign nations greatly influenced the United States of America because the products produced by foreign nations compete with the American products in the market. This competition causes negative effects on the economy of United States when more products of foreign countries are sold as compared to American products due to lower prices of foreign nations products.
2. Big challenges are created by nontraditional economies, natural disasters, and emerging democracies on the United States government because these factors lowers the production and sale of American products in the market that affected the economy.
The answer to your question is A- is