challenge: Who was the father of John Christian, Count Palatine of Sulzbach?
  
  A. Theodore Eustace, Count Palatine of Sulzbach
  B. Eleonore Maria Amalia of Hesse-Rotenburg
  C. Joseph Charles, Count Palatine of Sulzbach
  D. John Christian, Count Palatine of Sulzbach (himself)
  Answer: 