State spokesperson: Many businesspeople who have not been to our state believe that we have an inadequate road system. Those people are mistaken, as is obvious from the fact that in each of the past six years, our state has spent more money per mile on road improvements than any other state.

Which of the following, if true, most seriously undermines the reasoning in the spokesperson's argument?

(A) In the spokesperson's state, spending on road improvements has been increasing more slowly over the past six years than it has in several other states.
(B) Adequacy of a state's road system is generally less important to a businessperson considering doing business there than is the availability of qualified employees.
(C) Over the past six years, numerous businesses have business have moved into the state.
(D) In general, the number of miles of road in a state' road system depends on both the area and the population of the state.
(E) Only states with seriously inadequate road systems need to spend large amounts of money on road improvements.

Though this one looks pretty simple and straighforward, still out of curiosity what is the reason behind the correct/wrong answer for this one.