Which of the following would be classified as an external cost?

A. You are not able to study at night because there is so much noise coming from the dorm room next to yours.
B. As more firms began hiring computer programmers, the salaries of computer programmers increased, and therefore the firm's cost of production increased.
C. A private firm will not provide national defense, as it is impossible to confine the benefits to only those individuals who have paid for it.
D. When you purchase a prescription drug, you are not made fully aware of all the possible side effects that may result from taking the drug.


Answer: A

Economics

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