Answer: C. Bridget drives her car after having too much alcohol to drink.
Step-by-step explanation:
The external cost, also known as third party cost, is all negative cost that a third party receives for a good buying for us, that is, the negative effect that will happen for something that we consume. For example, when we buy a vehicle, the external cost is the emission of gases that are harmful to the environment.
In this case, the external cost is the danger to drivers and pedestrians because Bridget bought alcohol and then drove.
I hope this information can help you.