Final answer:
The correct sentence showcasing the combined approach is the one mentioning researchers analyzing previous studies to identify common personality patterns across cultures, which integrates both Western and indigenous psychology concepts. So, the correct answer is option 3.
Step-by-step explanation:
The sentence that includes an example of the combined approach to studying personality in a cultural context is: "The researchers analyzed data from previous studies to identify common patterns in personality across cultures."
This sentence demonstrates the use of both the cultural-comparative approach and the indigenous approach, making it an example of the combined approach which serves as a bridge between Western and indigenous psychology, thereby understanding both universal and cultural variations in personality. So, the correct answer is option 3.