Suppose That a Market Is Initially in Equilibrium $P = 90 - Q ^ { d }$

Multiple Choice

Suppose that a market is initially in equilibrium. The initial demand curve is $P = 90 - Q ^ { d }$ . The initial supply curve is $P = 2 Q ^ { s }$ . Suppose that the government imposes a $\$ 3$ tax on this market. What are the government receipts from the tax?

A) $90.
B) $87.
C) $45.
D) $43.50.