The Supreme Court's Decision in Printz V

The Supreme Court's decision in Printz v.United States was important because it declared that

A) state and local officials could not be required to administer a federal regulatory program.
B) state and local officials could be required to administer a federal regulatory program.
C) the federal government could not regulate the working conditions or hours of labor for businesses engaged solely in intrastate commerce.
D) the federal government could regulate the working conditions and hours of labor for businesses engaged solely in intrastate commerce.