challenge: What is the format of the 40th Anniversary reissue of Jethro Tull's album Heavy Horses?
  
  A. A two-disc CD reissue with a live concert DVD
  B. A single-disc vinyl reissue with bonus tracks
  C. A digital-only release with remastered tracks
  D. A five-disc 'bookset' with a booklet and associated recordings
  Answer: 