171. What is the primary function of the Sliver Line? (A)To provide a direct connection between downtown Denver and several major suburbs and residential areas. (B)To serve as an express line between the downtown core and Denver International Airport. (C)To offer a reliable and convenient transportation option for residents of the city's suburbs and outlying neighborhoods. (D)To provide a circular route around the downtown core, allowing commuters to easily access various parts of the city center.