challenge: What is a common attribution for many of the vampire slaying kits that appear at auction or in museum collections?
  
  A. Nicholas Plomdeur and Baron Hailey
  B. Baron Hailey and Professor Ernst Blomberg
  C. Baron Hailey and the man who confessed to inventing the kits
  D. Professor Ernst Blomberg and Nicholas Plomdeur
  Answer: 