What development allowed the american economy to be affected by economic problems in other regions of the world?

The correct answer is: "globalization and market integration"

Economic globalization has involved market integration. Both have possible due to improvements in both transport and communications technologies. Many trade barriers have dissapeared and many markets of goods, services and factors of production function at an international or global level.

The US participates in integrated markets and this is why its economy is affected by problems which have arisen in other regions of the world.

begins a massive airlift of food, water, and medicine to the citizens of the besieged city

in february 1787, congress decided that a convention should be convened to revise the articles of confederation, the nation’s first constitution. in may, 55 delegates came to philadelphia, and the constitutional convention began. debates erupted over representation in congress, over slavery, and over the new executive branch. the debates continued through four hot and muggy months. but eventually the delegates reached compromises, and on september 17, they produced the u.s. constitution, replacing the articles with the governing document that has functioned effectively for more than 200 years.