scientific theory is an explanation of some aspect of the natural world that can, in accordance with the scientific method, be repeatedly tested, using a predefined protocol of observations and experiments.
feudalism: system of rule by local lords with ties of loyalty to a king.
Feudalism in Western Europe was similar to feudalism in Japan in that: power was based on class relationships.
Hope this helps.
Every communist country ever,
China, Venezuela, Cuba, ect
A is the fist answer not sure about the second