Together with the economic and political exchange between the East and West, religions of the West were introduced into China via the world-famous route. Buddhism, Zoroastrianism, Manicheism, Nestorianism and Islam were cultural treasure of the ancient west, which were bestowed upon China during the old times
I think it's B. because it shows that the president doesn't do all of the work. but it could be A, because checks and balances practically means the same thing
