How Did the Patrona Halil Rebellion Show "Decay at the Center

How did the Patrona Halil rebellion show "decay at the center" yet spell "benefit elsewhere"?

A) It provided the Janissaries with additional funding for gunpowder.
B) The cities at the center of the empire were burned to the ground.
C) The flow of gold and other valuable metals tended to benefit the provinces.
D) It demonstrated that local elites in the provinces were beginning to gain power relative to the sultan.
E) Even though the merchants were failing, it was a time of strength for the military.