Table 10-2 the Following Table Shows the Private Value, Private Cost, and Cost

Multiple Choice

Table 10-2
The following table shows the private value, private cost, and social value for a market with a positive externality.
-Refer to Table 10-2. What is the equilibrium quantity of output in this market?

A) 3 units
B) 4 units
C) 5 units
D) 6 units