The Main Difference Between Neorealists and Classical Realists Is That

The main difference between neorealists and classical realists is that

A) classical realists focus on human nature and neorealists focus on anarchy.
B) classical realists study historical cases and neorealists study current events.
C) unlike classical realists, neorealists take technology into account in their theories.
D) unlike classical realists, neorealists focus on policy rather than theory.