Which of the Following Is a Real-World Example of a Negative

Multiple Choice

Which of the following is a real-world example of a negative externality?

A) You are craving a soda for lunch. However, the customer ahead of you in line at the hot dog stand buys the last can.
B) National defense is available even for people who do not pay income taxes.
C) A person seated in a non-smoking section of a restaurant decides to sneak a few puffs of a cigarette.
D) A child receives a vaccination to prevent the spread of measles.