Answer: B) 90%
According to data put out by the US Department of Transportation, in 2001 90% of Americans drove to work in cars. In fact, New York City is the only locality in the country where more than half of all households do not own a car (the figure is even higher in Manhattan with only 25% car ownership, vs a national rate of 92%)." When it comes to the prevalence of America's car culture, that about says it all.
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