Which of the Following Statements Best Explains Why Consciousness Has

Which of the following statements best explains why consciousness has been viewed as a "stream" or "river?"

A) Even though the contents of consciousness are constantly changing, we subjectively experience consciousness as being continuous and unbroken.
B) Although we are aware of some of the contents of consciousness, consciousness can only be understood if you look below the ―water line,‖ at thought processes of which we are unaware.
C) Consciousness can only be understood by looking at the environmental forces that shape our conscious thoughts.
D) Consciousness can only be understood by using introspection.