The best answer to how feudalism in Japan compared to feudalism in Western Europe is:
A. In Western Europe, knights battled for their lord, just as samurai battled for their daimyo.
This statement accurately reflects a key similarity between the two systems, as both knights and samurai were warrior classes that served lords or daimyo in their respective societies, adhering to codes of loyalty and conduct in battle. The other options do not accurately capture the complexities or distinctions between the two systems or contain inaccuracies regarding the power dynamics involved.