A negative externality that might arise as a result of four new major highways being added from north to south is Rise in air pollution.
What is a negative externality?
A negative externality refers to an adverse effect that a third party experiences even though they were not involved in the initial transaction that produced the effect.
Air pollution is a negative externality because the people around those highways will be affected by it even if they do not own any of the cars that will ply the four new major highways.
In conclusion, option C is correct.
Find out more on negative externalities at https://brainly.com/question/13901028
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