Table 12 Shows the Hypothetical Trade-Off Between Different Combinations of Stealth

Table 1.2 shows the hypothetical trade-off between different combinations of Stealth bombers and B-1 bombers that might be produced in a year with the limited U.S.capacity,ceteris paribus. Table 1.2
Production Possibilities for Bombers
$$\begin{array} { | l | c | c | c | c | } \hline \text { Combination } & \begin{array} { c } \text { Number of B- } \\1 \text { Bombers }\end{array} & \begin{array} { c } \text { Opportunity } \\\text { cost(Foregone } \\\text { Stealth) }\end{array} & \begin{array} { c } \text { Number of } \\\text { Stealth Bombers }\end{array} & \begin{array} { c } \text { Opportunity cost } \\\text { (Foregone B-1) }\end{array} \\\hline \text { A } & 20 & \text { NA } & 195 & \\\hline \text { B } & 35 & & 180 & \\\hline \text { C } & 45 & & 150 &\\\hline \text { D } & 50 & & 100 & \text { NA } \\\hline\end{array}$$ Refer to Table 1.2.In the production range of 20 to 35 B-1 bombers,the opportunity cost of producing 1 more B-1 bomber is

A) 195/20 of Stealth bombers.
B) 35/20 of Stealth bombers.
C) 15 Stealth bombers.
D) 1 Stealth bomber.