Two nations sign a trade agreement expecting to enjoy mutual gains from the trade of a certain good. How will this event likely affect the supply of the good in the two nations?

A. This event will likely cause a decrease in the quantity supplied of the good in both nations.

B. This event will likely cause an increase in the quantity supplied of the good in both nations.

C. This event will likely cause a decrease in the supply of the good in both nations.

D. This event will likely cause an increase in the supply of the good in both nations.