challenge: What instruments are featured in Bach's cantata Tritt auf die Glaubensbahn, BWV 152?
  
  A. Recorder, oboe, viola d'amore, and viola da gamba
  B. Trumpet, trombone, and organ
  C. Recorder, oboe, violin, and basso continuo
  D. Flute, harpsichord, and cello
  Answer: 