Which of the following are examples of activities accompanied by external costs or benefits? Instructions: In order to receive full credit, you must make a selection for each option. For correct answer(s), click the box once to place a check mark. For incorrect answer(s), click the option twice to empty the box. ? Driving a car. ? Buying a used car. ? Inventing something which is new and useful and cannot be patented. 2 Buying a painting at an auction. ? Inventing something which is new and useful and can be patented