challenge: Which of the following is NOT a feature of BoA's twenty-seventh Japanese single, 'Eien / Universe / Believe in Love'?
  
  A. Includes a bonus track with a mashup of her best hits
  B. Collaboration with Crystal Kay and Verbal of M-Flo
  C. Release date on February 18, 2009
  D. Available in vinyl format
  Answer: 