challenge: Who were the parents of Maria Thaddäus von Trautmannsdorff?
  
  A. Imperial Count Weikhard Joseph von Trauttmansdorff-Weinsberg and Countess Maria Anna von Wurmbrand-Stuppach
  B. Duke Leopold I of Styria and Duchess Maria Theresa
  C. Emperor Franz Joseph I and Empress Elisabeth
  D. King Frederick II of Prussia and Queen Maria Theresa
  Answer: 