One way in which knights, samurai, and warlords
are similar is that they all
(1) were traditional religious leaders
(2) occupied military posts in the Chinese
Empire
(3) expelled the Moors from Spain
(4) held positions of power in feudal systems
The right answer is (4): held positions of power in feudal systems.
Some examples why the other answers are wrong inlude: Samurai are from Japan and they did not fight in Spain (not 3) and they were military fighters, not religious leaders (not 1)