Table 10-1 the Following Table Shows the Private Value, Private Cost, and Cost

Multiple Choice

Table 10-1
The following table shows the private value, private cost, and external cost for various quantities of output in a market.
-Refer to Table 10-1. How large would a corrective tax need to be to move this market from the equilibrium outcome to the socially-optimal outcome?

A) $2
B) $3
C) $9
D) $10