In the "Iceberg Model of Multicultural Influences on Communication," the Iceberg

In the "iceberg model of multicultural influences on communication," the iceberg analogy is used because much of what affects communication

A) ​can be determined by looking very closely for clues.
B) "freezes out" the two parties involved if the message content is not correctly stated.
C) is unseen and not readily apparent.
D) is related to cultural misunderstandings.
E) can be determined by biomedical testing.