Answer:
D. the market may oversupply goods that generate negative externalities on others.
Step-by-step explanation:
A product can be defined as any physical object or material that typically satisfy and meets the demands, needs or wants of customers. Some examples of a product are mobile phones, television, microphone, microwave oven, bread, pencil, freezer, beverages, soft drinks, radio, table, etc.
In Economics, an externality could either be positive or negative depending on its effect on a third party.
A positive externality arises when the production or consumption of a finished product or service has a significant impact or benefits to a third party that isn't directly involved in the transaction.
On the other hand, a negative externality arises when the production or consumption of a finished product or service has a negative effect and/or impact (cost) on a third party.
This ultimately implies that, an externality is typically an unwarranted cost or benefit by a manufacturer or producer of goods and services that eventually affects a third party.
On a related note, externalities may prevent competitive markets from operating efficiently because the market may oversupply goods that generate negative externalities on others. Some examples of a negative externality is John declining to buy his favorite candy due to an increase in its price, a manufacturing plant that causes noise and pollution to the people living around where it is situated, etc.