Which statement best describes American federalism since the 1930s?

A  The growing power of state governments since the 1930s has fundamentally altered American federalism by rendering the federal government obsolete.

B  The growing power of the federal government since the 1930s has fundamentally altered American federalism by rendering state governments obsolete.

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  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.