The u. s. constitution establishes a federal system of government. which statement best describes a federal system of government?

The u.s. constitution establishes a federal system of government  statement best describes a federal system of government is that: federal system shares power between he central-federal government and the states that creates that federation 

Britain and its empire stood alone against hitler and mussolini. in june 1941, hitler broke the non-aggression agreement with stalin and germany invaded the soviet union. in december, japan attacked the us and britain. the main lines of world war ii had formed.