The correct answer is: D. all of the above
Explanation:
1. Fireworks: After the fall of the wall, there were firework displays to mark the occasion and celebrate the reunification.
2. Singing: People celebrated by singing songs, chants, and national anthems to express their joy and unity.
3. Lots of people: The event attracted a large crowd of people who came together to celebrate the historic moment.
All of these elements - fireworks, singing, and the presence of a large crowd - contributed to the celebratory atmosphere surrounding the fall of the wall.
