All of the following are geographic barriers that helped protect the peoples of China from invasion EXCEPT

judaism, christianity and islam, are all abrahamic religions and therefore have in common the hebrew idea of a single god which is the source of all morality. the idea of the covenant is only related to judaism, while dharma is a concept of indian religions and the four noble truths are basic principles of buddhism.

(1)representation based on state population (2)all states have equal representation apex