Which of the Following Activities Is Most Likely to Generate

Multiple Choice

Which of the following activities is most likely to generate a positive externality?

A) Tony plants roses in the large flowerbed in front of his condominium.
B) Terry buys a cheeseburger from McDonalds.
C) Pat installs a new CD player in his sedan.
D) Sam shovels the snow from the porch of his house.