Just take the points im bored

Why did david smith burnish the surface of his work cubi xix?

Which description most closely matches a typical country song? a - a song with simple and direct lyrics b - a song with complicated harmony and melody c - a song with instrumentation but no lyrics d - a song based on an old english ballad

In a paragraph of no less than 125 words, explain the single most important factor involved in advancing american classical music in the twentieth century.