Answer the question based on the following information for a public good.P_aandP_bare 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.

Q P_a P_b

1 $3 $5

2 2 4

3 1 3

4 0 2

5 0 1

The collective willingness of this society to pay for the second unit of this public good is

MULTIPLE CHOICE

A)8

B)4

C)1

D)6

E)2