Which of the Following Best Illustrates the Idea That Meaning

Which of the following best illustrates the idea that meaning is shared-that is, it exists in participants' mutual interpretations?

A) The sonographer seeks to put a patient at ease by saying, "I'll be right here." The patient smiles in gratitude.
B) The doctor correctly concludes that her assistant is worried based on the assistant's worried expression.
C) A therapist who has known a particular patient for a long time says "Not you again!" when the patient walks in. Both laugh.
D) All of these illustrate it.