The federal minimum wage law requires that most workers be paid at least $5.15 per hour. A governor of a small industrial state, in which the standard of living is considerably below national levels, perceives that some employers might be willing to hire more workers if the amount were lowered. In order to increase the general welfare of the citizens of this state, he proposes to the legislature a bill lowering the minimum wage in certain industries and especially for certain age groups. Such a state Act would probably be declared unconstitutional because of

a. the full faith and credit clause.
b. the supremacy clause.
c. the political question doctrine.
d. the First Amendment.

B