Which mountains separate european russia from asian russia

It expresses disillusionment about the world that certain individuals felt in the 1920s.

B. It expresses disillusionment about the world that certain individuals felt.

Explanation:

During 1920 the Jazz Age was the culture followed in America. This culture developed new styles of music and dance. African Americans were benefited in this Jazz Age culture. Many new musical techniques were implemented with existing African traditions. Development of Jazz then reached America's white middle class too.

The passage also claims disappointment due to the discovery as it is not as good as one believed it to be.