The city's transportation department has noticed that the city's extensive public bus system generally runs behind schedule on days when traffic is heavier in the city. The transportation commissioner concluded that the traffic prevents the buses from reaching their stops on time, despite the existence of a number of bus-only lanes throughout the city. He has therefore proposed creating additional bus-only lanes on city streets to allow more buses to bypass traffic.
The success of the commissioner's proposal depends on which of the following assumptions?
A. Similar proposals have been effectively implemented in other cities. --> Out of scope
B. The city's bus-only lanes do not contribute substantially to gridlock by reducing the number of lanes available to other traffic. --> Correct, negate the statement and see how the argument falls apart
C. An increase in bus fare is not necessary as a result of the proposal. --> Irrelevant
D. The city owns enough buses to cover all established routes. --> Irrelevant
E. Automobile drivers will not object to the proposal. --> Irrelevant
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