Answer :
Answer: Option (a) is correct.
Explanation:
Alpha:
Opportunity cost of producing one apple = [tex]\frac{18}{9}[/tex]
= 2 oranges
Beta:
Opportunity cost of producing one apple = [tex]\frac{16}{4}[/tex]
= 4 oranges
It was given that the terms of trade are established as 1 apple for 2 oranges.
Therefore, there are no incentives for Alpha to trade until the terms of trade becomes greater than 2 oranges for one apple.