Can someone explain what a “monroe doctrine” is because google isn’t me at all? ?

What is zinn's approach to the study of history? what does he suggest occurs when history is told is the story of human progress?

On a production possibility curve, data points that fall outside of the curve represent an inefficient allocation of resources. a balanced allocation of resources. ideal production. a currently unattainable production.

Which behavior is appropriate in the laboratory? eating a snack while conducting an experiment mixing chemicals as instructed by the lab procedure tasting unknown chemicals to identify them tossing around a football with friends