Which of the Following Is an Example of a Negative

Which of the following is an example of a negative externality?

A) When Fazio parks his big truck at the grocery store, people in the cars on each side of his parking space have a hard time opening their car doors.
B) Bae's company has a decrease in profits when the demand for its product falls.
C) Raul loses weight because he wants to feel better, but the weight loss means that he needs new clothes.
D) Rita gains weight while she is on vacation because she eats more than normal.