(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) Canada faces increasing opportunity costs.
B) Mexico faces increasing opportunity costs.
C) both Canada and Mexico face constant opportunity costs.
D) both Canada and Mexico face increasing opportunity costs.