Tobacco Products Are Regulated on the Basis That They Are

Tobacco products are regulated on the basis that they are manufactured in one state and sold throughout the country. This is an example of which of the following principles of U.S. health law?

A) Police powers allow states to pass legislation and take actions to protect the common good.
B) The Interstate Commerce Clause of the United States Constitution has been used as a basis for justifying federal action in the area of health.
C) A 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.