Modern Iranian Zoroastrians Blame the Sassanians for the Decline of Their

Modern Iranian Zoroastrians blame the Sassanians for the decline of their religion because Iranian Zoroastrians believe that:

A) the strong moral essence of Zoroastrianism was compromised due to its misuse for political purposes by the Sassanian kings.
B) the forceful conversion of Zoroastrians to Hinduism by Sassanians drastically reduced the Zoroastrian population.
C) the burning of sacred Zoroastrian writings by Sassanian kings weakened the Zoroastrian principle of goodness.
D) the murder of Zoroastrian priests and scholars by Sassanians drove people away from the religion.