In a bankruptcy, which of the following statements is true?

  a. An order for relief results only from a voluntary petition.
  b. Creditors entering an involuntary petition must have debts totaling at least $21,625.
  c. Secured notes payable are considered liabilities with priority on a statement of affairs.
  d. A liquidation is referred to as a Chapter 7 bankruptcy, and a reorganization is referred to as a Chapter 11 bankruptcy.