Answer:
You should eat three scoops of ice cream.
Explanation:
The marginal benefit is the amount a consumer would be willing to pay for an additional unit of a product and it tends to decrease when the consumption is higher. According to this and considering that the excerpt indicates that the ice cream costs $5, you should eat three scoops of ice cream because at this point your marginal benefit is $7 and the cost is $5 but if you eat an additional scoop, your marginal benefit is $2 which is the maximum amount you would be willing to pay but the cost is $5.
