An Advantage of Classifying Economies According to the Degree to Which

An advantage of classifying economies according to the degree to which they depend on markets or planning is that it allows us to:

A) focus on how societies deal with the economic decisions caused by scarcity.
B) map how a country's approach to making the basic economic choices changes over time.
C) sort economies according to the degree to which they depend on individual or collective decision making when dealing with the basic economic choices.
D) all of the above.