challenge: Who were the graziers that the Ivory Creek in Queensland was likely named after?
  
  A. Francis Jeffrey Ivory and James Ivory, two Queensland politicians
  B. James Ivory and Francis Jeffrey Ivory, two graziers who operated the Eskdale pastoral run
  C. James Ivory and Francis Jeffrey Ivory, two local farmers
  D. Francis Jeffrey and James Ivory, two early explorers
  Answer: 