Answer: 2. A, tradeoff.
3. I think it would be C, less than the marginal cost, but I'm not sure
Explanation:
2: The definition of trade off is an exchange where you give up one thing in order to get something else that you also desire. An example of a trade off is when you have to put up with a half hour commute in order to make more money.
3: Marginal decision-making means considering a little more or a little less than what we already have. We decide by using marginal analysis, which means comparing the costs and benefits of a little more or a little less.