Which of the following negative externalities would most likely result from adding four new major highways from north to south on this map?

I think you forgot to attach the map along with the choices in this question. I am answering the question based on my research and knowledge. "Rise in air pollution" would be the negative externality that would most likely result from adding four new major highways from north to south on this map. I hope it helps you.

The answer is d if you are on edgenuity.