In adapting a previous work, what do modern playwrights advocate to be the best method for changing ...

In adapting a previous work, what do modern playwrights advocate to be the best method for changing without hurting the integrity of the original work?
 
  A. Keeping most of the original script but updating
  and making cuts to go with the change in the
  audience, their understandings, and what entertains
  them.
  B. Taking the premise of the previous work, but
  completely starting over and rewriting the entire
  show with new references, language, and characters.
  C. Translating or copying the previous work verbatim,
  to keep the original theme and characters intact.
  D. None of these choices.