challenge: According to the decision in Graaff-Reinet Municipality v Van Ryneveld's Pass Irrigation Board, what is a requirement for the Supreme Court to hear and determine a claim or dispute as to water rights?
  
  A. That the claim or dispute is between two private parties
  B. That the claim or dispute has reached the stage of actionable maturity
  C. That the claim or dispute involves a significant amount of money
  D. That the claim or dispute is related to a minor issue
  Answer: 