What is the effect of an unaddressed negative externality on the market quantity produced?

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The efficient quantity surpasses the market equilibrium quantity.The market quantity may be greater or less than the efficient quantity.The market quantity matches the efficient quantity exactly.The market quantity is higher than the efficient quantity.None of the above.

Explanation

When a negative externality is not accounted for, the market tends to produce more than the socially optimal amount, causing the equilibrium quantity to be greater than the efficient quantity.