Which of the following statements best describes the Mahdiyya?

Which of the following statements best describes the Mahdiyya?
 
  A) A rebellion that combined national resistance to foreign rule and fundamentalist reaction against innovations.
  B) A jihad to purge Islam of Sufis, Shi'ites, and others who believed innovations were causing the decline of Islam.
  C) The enforcers of obedience who maintained moral order.
  D) A movement that destroyed objectionable innovations including the Prophet Muhammad's grave marker.
  E) A movement to return Islam to the time of intellectual inquiry and study of sciences.