challenge: Who are the presumed successors of the 7th Marquess in the Earldoms of Ormonde and Ossory?
  
  A. The 17th and 18th Dukes of Ormonde
  B. The 17th and 18th Earls of Ossory
  C. The 17th and 18th Barons of Ormonde
  D. The 17th and 18th Viscounts Mountgarret
  Answer: 