Hurry! nwhich best explains why international trade agreements are beneficial for developing economies?

The correct answer is the second: "They can help countries compete with the United States".

When a trade agreement is reached between two or several countries, this means that trade barriers are removed between the parties. Therefore, goods and services can go in and out without having to pay taxes at the border (this type of taxes which burden imports/exports are called duties). Duties are only one type of trade barrier, there are many others.

When the US reaches a trade agreement with a foreign country, goods from there can freely enter the borders and compete in equal conditions with goods produced by US industries.

This can be harmful for the US economies, when foreign imports are produced in much cheaper conditions than the domestic ones. This is common in some sector, such as the textile industry. Those cheaper imports are comercialized at a lower price and consumers would prefer them rather than more expensive ones produced in the US.

this means that germany had to pay the allied countries. reparations are/is essentially payment for something that they have done wrong, so after ww1, germany was forced to pay reparations so they could replenish the allied countries resources' that they had lost during the war.

c. troops marched forward in close formation against newer, more accurate weapons