Use the Following Table to Answer the Following Questions -In Above Table, What Is the Opportunity Cost of Producing

Use the following table to answer the following questions:
$$\begin{array} { | c | c | c | } \hline { \begin{array} { c } \text { Labor Requirements for Production in the East and West } \\\text { (labor hours per unit of output) }\end{array} } \\\hline & \text { Food } & \text { Clothing } \\\hline \text { East } & 10 & 20 \\\hline \text { West } & 5 & 15 \\\hline & & \\\hline\end{array}$$
-In above table, what is the opportunity cost of producing one additional unit of food in the West?

A) 3 units of clothing
B) 2 units of food
C) $\frac{1}{2}$ unit of food
D) $\frac{1}{3}$ unit of clothing