Which Statement Best Describes American Federalism Since the 1930s

Which statement best describes American federalism since the 1930s?

A) There has been no change in the strength of the federal government since the 1930s.
B) Although the federal government has grown significantly more powerful since the 1930s, the basic framework of American federalism has not been altered and state governments remain important.
C) Although the state governments have grown significantly more powerful since the 1930s, the basic framework of American federalism has not been altered and the federal government remains important.
D) The growing power of the federal government since the 1930s has fundamentally altered American federalism by rendering state governments obsolete.
E) The growing power of state governments since the 1930s has fundamentally altered American federalism by rendering the federal government obsolete.