The Study of Price Discrimination Is Both Interesting and Complex

The study of price discrimination is both interesting and complex because

A) there is no single model that represents how it is practiced in each firm or industry.
B) the single model that represents all price discrimination allows economists to delve more deeply into practical analysis.
C) monopolies are often shrouded in mystery and this practice opens a window into their day-to-day operations.
D) students of economics can relate to the examples,but aren't able to easily calculate how price discrimination is beneficial.
E) the consumer or the producer has the potential to maximize surplus,leading to rigorously debated social concerns.