Bunuel wrote:
Express Route Lanes' is the name of a strategy to help urban planners design city highways more effectively. Not only does it improve traffic flow, but it also improves safety on the roads. The reason for this type of planning is that traffic jams and accidents cannot be eliminated unless the work is done properly the first time.
The claim of safety made in the passage above rests on the presumption that:
A `Express Route Lanes' is a concept in urban planning that has not yet been put into the practice of building city highways.
B Any problems with city highways involving accidents, or traffic flow, would be eliminated by building `Express Route Lanes'.
C The strategy of `Express Route Lanes' would require a rethinking of how urban planners look at city highways.
D The primary goal of urban planners is to build highways that prevent traffic jams, regardless of cost.
E `Express Route Lanes' could be achieved by adjusting the speed limits for different lanes of a city highway.
OFFICIAL EXPLANATION
This is a supply the assumption question.
Identify the premises of the argument. In this example, `Express route lanes' is a concept in urban planning that improves a) traffic flow and safety on highways by b) doing the work properly the first time.
Identify the conclusion. Urban planning, including the idea of `Express route lanes', must be done correctly when highways are being built in order to avoid traffic jams and accidents after completion.
What is needed in order to make this argument convincing? Proof that the urban planning strategy of `Express route lanes' will make highways safer by getting rid of traffic jams and car accidents.
Eliminate choices that do not support the conclusion. We will look for a choice that suggests a highway must be built based on the idea of `Express route lanes' in order to support the conclusion. Choices C and D neither add to, nor detract from, the conclusion. Choices A and E could be seen as weakening the conclusion since A states this concept has never been put into practice, and E states that one could alter existing highways to fit the concept. Therefore,
B is the best answer because it states that traffic flow, and accidents, will be eliminated by building highways according to the principle of `Express route lanes'.
, iam not getting as to how we were able to eliminate Option E , is it because it defies the premise that the work must be done correctly at the first time to avoid accidents and improve traffic flow ?