Final answer:
Exactly four units of the public good should be produced, given the willingness to pay and marginal cost.
Step-by-step explanation:
The correct answer is Option B) Exactly four units of the public good should be produced. In this scenario, Pam is willing to pay $10 for the fourth unit of the public good, while Kunal is willing to pay $6 for the fourth unit. The marginal cost of producing the public good is constant at $4.
To determine the optimal quantity of the public good, we compare the willingness to pay of individuals (represented by the market price) with the marginal cost of production. If the market price is greater than the marginal cost, society would benefit from producing more of the good. If the market price is less than the marginal cost, producing more of the good would result in a net loss for society.
In this case, the market price ($10) is greater than the marginal cost ($4), so there is a benefit to producing more units of the public good. However, since both Pam and Kunal are only willing to pay for four units of the good, producing more than four units would not generate any additional benefit. Therefore, the optimal quantity of the public good is four units.