Which Constitutional Change Most Clearly Shifted the Balance of Power

Which constitutional change most clearly shifted the balance of power toward the federal government and away from the states in the American federal system?

A) Sixteenth Amendment, which allows the federal government to collect income taxes
B) Nineteenth Amendment, which establishes women's voting rights
C) Twenty-Second Amendment, which limits presidents to two terms
D) Twenty-Third Amendment, which allows the District of Columbia to participate in the electoral college
E) Twenty-Sixth Amendment, which establishes voting rights for eighteen- to twenty-year-olds