According to the Buddhist Understanding, the Dharma Will Continue to Decline

According to the Buddhist understanding, the dharma will continue to decline until when?

A) It will perpetually decline until the end of this illusory world
B) Until the next buddha restarts the wheel
C) Until the bodhisattvas answer prayers of the faithful
D) Until enough people recognize our collective need for enlightenment
E) Until cataclysmic events compel a shift in collective consciousness