Refer to the Graph Shown

Refer to the graph shown. Initially, the market is in equilibrium with price equal to $25 and quantity equal to 100. As a result of a per-unit tax imposed by the government, the supply curve shifts from S₀ to S₁. The effect of the tax is to:

A) give government tax revenues of $100.
B) give government tax revenues of $400.
C) reduce producer surplus by $375.
D) reduce producer surplus by $400.