What came last?

A. The Great Depression

B. The Grand Ole Opry

C. The House Un-American Activities Committee

D. Folk-rock

The correct answer is D. Folk-rock

Folk-rock only arrived in the US in the mid-1960s.

The Great Depression (the biggest economic depression in the United States) dates back to the 1930s. The Gran Ole Opry (the eldest radio show in America that is still ongoing today) was founded in 1925. And lastly, the House Un-American Activities Committee was created in 1938.