Under What Conditions Do Positive Externalities Exist

Multiple Choice

Under what conditions do positive externalities exist

A) Social value exceeds private value, and market quantity exceeds the socially optimal quantity.
B) Social value is less than private value, and market quantity exceeds the socially optimal quantity.
C) Social value exceeds private value, and market quantity is less than the socially optimal quantity.
D) Social value seldom exceeds private value, and therefore social quantity is less than private quantity.