It made the world seem like a smaller place to many people.
The key word in this question is international, indicating that every country, or nearly every country, participates in pop culture. Focusing on this word allows the second, third, and fourth answers to be eliminated because they all discuss some idea of separation. Separation is the opposite of a shared type of culture as by definition, a shared culture brings people together. In this case, the shared, international pop culture brings countries together.