-The Figure Above Shows the Marginal Social Cost Curve of Generating

-The figure above shows the marginal social cost curve of generating electricity, the marginal private cost curve, and the demand curve. If the market is competitive and unregulated, the equilibrium quantity is ________ billions of kilowatt hours per day and the efficient quantity is ________ billion kilowatt hours per day

A) 150; 200
B) 200; 150
C) 0; 150
D) 250; 0
E) 150; 150