Arrange the following steps in the correct order for effective exam preparation in AP Microeconomics: 1) Engage in review sessions, 2) Familiarize with exam question types, 3) Understand key concepts like marginal benefits and costs, 4) Make optimal choices based on your understanding.

To prepare effectively for your AP Microeconomics exam, start by understanding key concepts like marginal benefits and costs. Once you have a solid grasp of these ideas, familiarize yourself with the types of questions you might encounter on the exam. After that, engage in review sessions to reinforce your learning and clarify any doubts you may have. Finally, use your understanding to make optimal choices during the exam, applying what you've learned to answer questions accurately. For example, if a question asks about the trade-offs of a decision, you can apply your knowledge of marginal benefits to choose the best option.