During the 1980s, profit from the sale of weapons to Iran was used to a) stop the communists in Costa Rica.
b) start a proxy war in El Salvador
c) support the Contras in Nicaragua.
d) stage a coup d'état in Guatemala

What would lead a historian to consider two events to have a relationship of correlation rather than causation

In 1944, the supreme court upheld the authority of the u.s. government to order the internment of a minority group in the interest of national security, even though there was no evidence that any members of this group were disloyal to the united states. should the same policy be applied today against u.s. muslims or muslim immigrants? why or why not? are these forms of internment different from native reservations? if so how? if not, why?

What is the main idea of this excerpt