Use the Following to Answer Question

Multiple Choice

Use the following to answer question:
Figure: Marginal Private Benefits and Marginal Social Benefits
-(Figure: Marginal Private Benefits and Marginal Social Benefits) Use Figure: Marginal Private Benefits and Marginal Social Benefits.One way for the government to achieve this socially optimal level is by:

A) imposing a per-unit tax equal to P₁ - P_2.
B) providing a per-unit subsidy of P₀ - P_2.
C) providing a per-unit subsidy of P₁ - P_2.
D) leaving the quantity at the initial private market-clearing quantity and price.