challenge: How were casual vacancies filled in the 25th, 26th, and 27th Legislative Assemblies of New South Wales?
  
  A. A by-election was held to fill the vacant seat
  B. The next unsuccessful candidate on the incumbent member's party list filled the vacancy
  C. The Clerk of the Assembly determined the replacement based on a random draw
  D. The departing member nominated their own replacement
  Answer: 