The Figure Below Shows Arcticland's Annual Production Possibilities Boundary for the Production

The figure below shows Arcticland's annual production possibilities boundary for the production of fish and ice. FIGURE 32-4
-Refer to Figure 32-4.Suppose a trading partner offers to give Arcticland some fish in exchange for its ice.If Arcticland is to improve its consumption possibilities,the terms of trade must be 1 tonne of fish for

A) 5 tonnes of ice.
B) 4 tonnes of ice.
C) 3 tonnes of ice.
D) 2 tonne of ice.
E) 1 tonne of ice.