DXY Limited files suit against enforcement of a new federal law regarding transporting toxic waste. DXY argues Congress lacked authority to enact this statute under the Commerce Clause. Under current Supreme Court interpretation of the Commerce Clause, Congress has the right to regulate: a$.$ any activity that substantially affects interstate commerce. b$.$ all commerce occurring within the United States.c$.$ only commerce that crosses state borders $($i$.$e$.$ goods made in State A$,$ sold in State B$).$ d$.$ intrastate commerce.