Correct option is C
Explanation:
1. You personally disapprove of piracy, so helping would violate your values.
2. Confronting your friend publicly (Option A) could create unnecessary tension in a casual social setting.
3. Watching the movie and later reporting your friend (Option B) is extreme and could damage trust.
4. Helping your friend (Option D) compromises your principles.
C is best:
Upholds your personal ethics by not participating in illegal activity.
Avoids embarrassment, conflict, or awkwardness in front of others.
Maintains your friendship and social harmony.
So, Discreetly excuse yourself from participating in the setup or watching the movie, perhaps by saying you need to make a call or step outside for a moment.
Thus, correct option is (c).