Which answer choice correctly contrasts the forms of government used in the United Kingdom and Russia? A. The United Kingdom is a Parliamentary Democracy that concentrates power in the legislature; Russia is a Presidential Democracy in which the executive holds much power. B. The United Kingdom uses a presidential system in which most power is held by a Queen; Russia is parliamentary system in which most power is held by the prime minister. C. The United Kingdom and Russia are both parliamentary systems that concentrate power in the legislature. D. The United Kingdom and Russia are both presidential systems in which most power is held by a president.