The correct answer is - B. A teenager in India attends a rap concert.
The cultural diffusion, in essence, means accepting a culture, social traits, from another culture in the world. In the globalization era this has become very common, and that is due to the constant communication of the people around the world, as well as the promotion and exposure to different cultures through the media.
In this case, we have the rap music, which is an American type of music, but it is listened by a person in India to which the rap music is not native, so by accepting and listening to the rap music, the person from India participates in what is known as cultural diffusion.