Congress provides by statute that any state that fails to prohibit automobile speeds of over 55 miles per hour on highways within the state shall be denied all federal highway construction funding. The state of Atlantic, one of the richest and most highway-oriented states in the country, refuses to enact such a statuteWhich of the following potential plaintiffs is most likely to be able to obtain a judicial determination of the validity of this federal statute?
A taxpayer of the United States and the state of Atlantic who wants his state to get its fair share of federal tax monies for highways, and who fears that, if it does not, his state taxes will be increased to pay for the highway construction in the state of Atlantic that federal funds would have financed.  Contractors who have been awarded contracts by the state of Atlantic for specific highway construction projects, which contracts are contingent on payment to the state of the federal highway construction funds to which it would otherwise be entitled.  An automobile owner who lives in the state of Atlantic and regularly uses its highway system. An organization dedicated to keeping the federal government within the powers granted it by the Constitution.