Understanding One's Own Culture Requires Additional Study

Understanding one's own culture requires additional study:

A) to find out why cultural traits in one's own country does not affect market behavior.
B) as much of the cultural influence on market behavior is at the subconscious level.
C) without which understanding the cultural traits of one's own country is impossible.
D) because an average manager must have extensive cultural knowledge of all countries in the world.
E) as cultural influence on one's own market behavior is generally minimal.