(Table) Based on the Table $\text {Canada's Production Possibilities}$ $\begin{array} { c c } \text { Tons of Steel } & \text { Airplanes } \\ 15 & 0 \\ 10 & 4 \\ 5 & 8 \\ 0 & 12 \end{array}$

(Table) Based on the table: $\text {Canada's Production Possibilities}$
$\begin{array} { c c } \text { Tons of Steel } & \text { Airplanes } \\ 15 & 0 \\ 10 & 4 \\ 5 & 8 \\ 0 & 12 \end{array}$

$\text {Mexico's Production Possibilities }$

$\begin{array} { cc} \text {Tons of Steel}& \text {Airplanes}\\6 & 0 \\ 4 & 2 \\ 2 & 4 \\ 0 & 6 \end{array}$

A) only Mexico would gain from trade between the two countries.
B) only Canada would gain from trade between the two countries.
C) neither country would gain from trade between the two countries.
D) both countries can gain from trade.