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.