challenge: What was the primary source of Otis Redding's officially released live recordings?
  
  A. His five-song set at the Woodstock Music & Art Fair in August 1969
  B. A series of shows performed at the Fillmore in San Francisco in 1968
  C. A series of shows performed at the Whisky a Go Go in April 1966 and the Stax/Volt Revue tour of Europe in March and April 1967
  D. A series of shows performed at the Apollo Theater in New York City in 1965
  Answer: 