A. As You Read As you read Section 2, fill in two supporting facts or details under each main idea by answering
Main Idea: Trade-offs are alternatives that people give up when they choose one course of action
over another.
each question.
1. Who makes trade-offs?
2. Why do decisions involve trade-offs?
Main Idea: Opportunity cost is the most desirable alternative given up as the result of a decision.
3. How does opportunity cost vary?
4. Why does opportunity cost vary?
Main Idea: Deciding whether to do or use one more or one less unit of some resource is thinking
at the margin.
5. What does thinking at the margin help with?
6. What does thinking at the margin help compare?