What made the initial u. s. system of government a confederacy?

Which four of these developments were made under mongol rule during the pax mongolica? the extension of the grand canal in china the spread of christianity the spread of weapons that used gun powder the invention of new medicines the establishment of a postal system the invention of geometric models of lunar motion

The united states mexico’s economy during world war ii byordering raw materials and offering workers jobs.buying the rights to its oil and mineral fields.paying for mexico’s weapons and recruiting soldiers.investing in mexico’s roads and railroads.correct answer on edge.. "ordering raw materials and offering workers jobs."

Was the us justified in using the atomic bomb on hiroshima and nagasaki? why or why not?