Solution:Analysis of Each Statement:
Statement A: It is the benefit that individuals and countries obtain by participating in international trade.
This is a correct definition of gains from trade. Gains from trade refer to the benefits countries and individuals receive from trading goods and services.
Statement B: It is the gross benefit to economic agents resulting from an increase in trade.
This is partially correct but not precise. The term "gross benefit" is used less often compared to "net benefit," which accounts for costs. However, it doesn't entirely contradict the concept.
The provided solution marks this as incorrect, likely due to the emphasis on "gross" over "net" in formal economic definition.
Statement C: It is the Producer Surplus minus the Consumer Surplus.
This statement is incorrect. Gains from trade are not calculated by subtracting Consumer Surplus from Producer Surplus. Instead, they are often represented as the sum of the two.
Statement D: It is the net benefit to economic agents resulting from an increase in trade.
This is a correct definition. Gains from trade are correctly viewed as the net benefit.
Statement E: It is the sum total of Producer Surplus and Consumer Surplus.
This is a correct definition. Gains from trade are often measured as the total sum of the increase in Producer Surplus and Consumer Surplus.
The correct option is (b) Only B, C.