Question: Nevada passes a statute that any $18-$wheel truck passing through Nevada must meet a Clean Fuel Fleet Exhaust Emission Standard of no more than $2\mathrm{.}8$ nitrous oxide $($NOx$).$ The federal statute requirement for such trucks is no more than $3\mathrm{.}8$ NOx. Carlton is driving his $18-$wheeler cross$-$country to deliver a load and stops at a Nevada weigh station. The weigh station

Nevada passes a statute that any $18-$wheel truck passing through Nevada must meet a Clean Fuel Fleet Exhaust Emission Standard of no more than $2\mathrm{.}8$ nitrous oxide $($NOx$).$ The federal statute requirement for such trucks is no more than $3\mathrm{.}8$ NOx. Carlton is driving his $18-$wheeler cross$-$country to deliver a load and stops at a Nevada weigh station. The weigh station officer inspects Carlton$$s documents, notes that Carlton$$s truck has a $3\mathrm{.}4$ NOx emission level, and issues a citation. On what grounds might Carlton fight this citation?

The state statute preempts the federal statute under the Full Faith and Credit Clause.

The federal statute preempts the state statute under the Full Faith and Credit Clause.

The federal statute preempts the state statute under the Supremacy Clause.

The state statute preempts the federal statute under the Supremacy Clause.