Suppose the Figure Shown Represents the Production Possibilities Frontier for Country

Suppose the figure shown represents the production possibilities frontier for Country A. Country B offers to trade four trucks for every airplane. Assuming Country A specializes in airplane production, which of the following combinations of goods could Country A consume?

A) (15 airplanes, 20 trucks)
B) (10 airplanes, 20 trucks)
C) (10 airplanes, 30 trucks)
D) (5 airplanes, 20 trucks)