During the 1980s, profit from the sale of weapons to iran was used to stop the communists in costa rica. start a proxy war in el salvador. support the contras in nicaragua. stage a coup d’état in guatemala.

support the Contras in Nicaragua

Explanation:

The United States were heavily involved in the global politics during the 1980's, as they were before that and after that. Since they had interests pretty much everywhere int he world, that meant that they had lot of funding to do in order to achieve their goals. One of the countries of interest was Nicaragua. The country had a very large communist movement, and the United States were not going to allow a country so close to them to become an ally of the Soviets, so they supported the Contras who fighting against the communist. In order to fund the Contras, the United States were looking for sources of profit, and Iran was ideal for it. Even though Iran was under sanctions, the United States were selling weapons to this country behind closed doors, and the money from it were used to sponsor their allies elsewhere, including in Nicaragua.

C

Explanation:

the hereditary right of a monarch to rule from the mandate of heaven

porter is writing economic history because he is focusing on the cost of developing vaccines.