Which of these examples uses the deductive method of presenting an argument?

a. The city's bus system is inefficient and wasteful. A study by the Bus Rider's Association shows that bus routes do not serve the populations that need this service most and that routes with few riders are overserved.
b. A city's bus system needs to be adequately funded in order to maintain its quality and efficiency. Last year, the city council cut the budget for the bus system by 10 percent. City residents can expect the quality of the bus service to decline.
c. Why are so many buses nearly empty most of the time? Readers probably have their own ideas about this situation. What do you think?