Answer the Question on the Basis of the Following Table

Multiple Choice

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. 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.