challenge: Who is the current owner/operator of the Château de Boisgeloup?
  
  A. Pablo Picasso's grandson, Bernard Ruiz-Picasso, and gallerist Almine Rech
  B. A French art collector, François Pinault
  C. Pablo Picasso's great-granddaughter, Diana Widmaier Picasso
  D. The French government's Ministry of Culture
  Answer: 