Mayor: There has been a long debate in city council about how to accommodate projected increases in automobile traffic. Today, our choice is clear: either we adopt my plan to build a new expressway, or we do nothing. Doing nothing is not a viable option because our existing system of roads would be in gridlock within ten years given even a conservative estimate of future traffic levels. City council should ttherefore adopt my plan. The reasoning in the mayor's argument is most vulnerable to which one of the following criticisms? ['It bases a projection only on conservative estimates rather than considering a wider range of estimates.', 'It takes for granted that the options it considers are mutually exclusive.', 'It presents a choice that is limited to two options, without giving reasons for not considering any other options.', "It fails to address the issue of the cost of traffic gridlock to the city's economy."]