challenge: How was the album 'What's Left of Spider John' by John Koerner recorded?
  
  A. In surround sound through condenser microphones and mixed using analog consoles
  B. In stereo through digital microphones and mixed using modern software
  C. In mono through ribbon microphones and mixed live to digital workstations
  D. In mono through valve microphones and mixed live to tape using vintage Ampex equipment
  Answer: 