Use the Following to Answer Questions: Table: Production Possibilities for the United

Use the following to answer questions: Table: Production Possibilities for the United States and Mexico $$\begin{array} { l c c } \hline & \text { Corn (millions of tons) } & \text { Potatoes (millions of tons) } \\\hline \text { United States } & 50 & 10 \\\text { Mexico } & 40 & 5 \\\hline\end{array}$$
-(Table: Production Possibilities for the United States and Mexico) According to the table on production possibilities for the United States and Mexico, Mexico's opportunity cost of producing each ton of potatoes is ______, while the United States' opportunity cost of producing each ton of potatoes is ______.

A) 0.125 tons of potatoes; 0.2 tons of potatoes
B) eight tons of corn; 0.2 tons of potatoes
C) eight tons of corn; five tons of corn
D) five tons of corn; 0.2 tons of corn