One drawback of voluntary trade is that it a requires two groups to use a common language

b can make one group dependent upon another for necessary goods

c doesn't occur unless there is a shortage of goods for at least one group

d forces groups to rely on themselves to produce all the goods they need

The map shows the allied strategy in the pacific. what does the movement of allied troops reveal about their strategy? the allies’ objective was to reach japan as soon as possible. the allies kept getting diverted in their quest to reach japan. the allies overtook outlying islands to make access to japan easier. the allies retreated just before they reached the first set of islands.