The 1622 janissary revolt against the signaled the beginning of the end to this empire. 1. safavids 2. umayyads 3. ottomans 4. mughals

The answer is Ottoman or number 3.  They were no longer the disciplined fighting force that threatened Europe.  They were not as dedicated and their performance deteriorated.  Sultan OsmanII blamed them for the loss in Poland but when he tried to get rid of them the Janissaries revolted and had him jailed then killed.

b because thats the naswer i got

answer; independent variable;