Consider an Economy with Three Consumers, Each with a Marginal

Consider an economy with three consumers, each with a marginal benefit for a public good of MB = 10 - q.What is society's marginal benefit (MB_T) for the public good?

A) MB_T = 10 - 3q
B) MB_T =30- 3q
C) MB_T =10 - 1/3.q
D) MB_T =30 - 1/3q
E) None of the above.