Answer: (B)
His sense of surprise suggests that he had not previously lived in a culture characterized by "COLLECTIVISM".
Step-by-step explanation:
A culture characterised by collectivism tends to give priority to working as a group, respecting group values and building personal relationships.
This is opposed to an individualistic culture where everyone focuses on individual benefits without so consideration of others.
Respect for others is characteristic of a collectivistic culture, and Mr Thompson's surprise suggests that he had not lived within such a culture.