Answer the Question on the Basis of the Following Information

Multiple Choice

Answer the question on the basis of the following information for a public good. Pa and Pb are the prices that individuals A and B are willing to pay for the last unit of a public good, rather than do without it. These people are the only two members of society. Suppose government has already produced 4 units of this public good. The amount individual B is willing voluntarily to pay for the fourth unit is

A) $14.
B) $5.
C) $2.
D) $0.