Answer the Question on the Basis of the Following Table

Answer the question on the basis of the following table that shows the total costs and total benefits facing a city of five different potential baseball stadiums of increasing size.All figures are in millions of dollars. $\begin{array}{l}\begin{array}{ccc}\underline{\text { Stadium }}&\underline{\text { Total Cost }}&\underline{\text { Total Benefit }}\\\text { A } & \$ 80 & \$ 140 \\\text { B } & 100 & 200 \\\text { C } & 130 & 250 \\\text { D } & 165 & 290 \\\text { E } & 220 & 300\end{array}\end{array}$ Refer to the table.The marginal cost and marginal benefit of stadium B (relative to A) are:

A) $20 million and $50 million,respectively.
B) $100 million and $200 million,respectively.
C) $30 million and $50 million,respectively.
D) $20 million and $60 million,respectively.