Which of the following statements is correct with respect to ownership, possession, or access to a CPA firms audit working papers?

a. Working papers are not transferable to a purchaser of a CPA practice unless the client consents. b. Working papers are the clients exclusive property. c. Working papers may never be obtained by third parties unless the client consents. d. Working papers are subject to the privileged communication rule which, in most jurisdictions, prevents any third-party access to the working papers.