challenge: Who did Ludwig Wilhelm, Prince of Bentheim and Steinfurt, marry on 27 June 1839?
  
  A. Princess of Hesse-Kassel
  B. Princess Augusta of Hohenlohe-Ingelfingen
  C. Landgravine Bertha of Hesse-Philippsthal-Barchfeld
  D. Charles, Landgrave of Hesse-Philippsthal-Barchfeld
  Answer: 