Who of the following was famous for his song-and-dance routine, "Jim Crow"?

Describe the state of radio programming prevalent in the late 1940s, just before the Top 40 format was developed, and describe Top 40 as well.

What will be an ideal response?

________, from Huntington Beach, CA, is one of the most important and influential Death Metal bands.

Fill in the blank(s) with the appropriate word(s).