Which method argues that individuals and groups act in patterned ways that can produce observable and testable hypothesis

by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.

world bank is the correct answer.

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explanation: