Final answer:
Nina, a marketing student, is likely focusing on the cultural differences and diversity in international markets.
Step-by-step explanation:
When Nina, a marketing student, studies how people from different countries accept ambiguity or follow rules and laws, she is likely focusing on the markets' cultural differences and diversity.
Understanding how people from different cultures respond to ambiguity and rules is essential for marketing strategies in international markets. Different cultures may have varying expectations and preferences, and marketers need to adapt their strategies accordingly to effectively reach these diverse markets.