Use the Following to Answer Question

Multiple Choice

Use the following to answer question:
Figure: An Individual's Marginal Benefit from a Public Good
-(Figure: An Individual's Marginal Benefit from a Public Good) Use Figure: An Individual's Marginal Benefit from a Public Good.Assume that two individuals will share consumption of a public good;each individual has the marginal benefit curve shown in the figure.What is the total social benefit from four units of the public good?

A) $16
B) $60
C) $140
D) $200