The United States Congress passes food safety laws that violate a treaty signed by a large number of nations but not the United States. Which of the following principles of United States health law is best illustrated by this statement?

A: The Interstate Commerce clause of the United States Constitution has been used as a basis for justifying federal action in the area of health
B: Provision of international law does not apply in the United States unless United States law incorporates the provision, such as ratification of a treaty by the United States Congress
C: The powers of the states are limited by the rights granted to individuals in the United States Constitution and in their state constitutions
D: Health care and public health are not mentioned in the United States Constitution thus the states generally have considerable authority in these areas.