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In this argument:
Premise : traffic prevents the buses from reaching their stops on time, despite the existence of a number of bus-only lanes throughout the city.

Conclusion: Create additional bus-only lanes on city streets to allow more buses to bypass traffic.

Assumption: Creation of more lanes should not increase the traffic. Option B works
Hope this helps!
:D
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Assumption is something that the author must believe to be true in order to draw the given conclusion. Without the assumption, the argument fails.

The ultimate technique to find assumption is to negate it, when you nagate the assumption argument fall apart.
When we negate option B it destroys the argument. Therefore B is the answer.
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Why not D?
If we negate D, that means we don't have enough buses, which means we don't have the capacity to take up more people on road?
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VasundharaS
Why not D?
If we negate D, that means we don't have enough buses, which means we don't have the capacity to take up more people on road?
Hi,
Option D does not have any impact on the argument. Even if there are less buses, this could still mean that creating more bus lanes could lead to smoother transport and less traffic. Buses could quickly pass through those lanes since due to a smaller number of buses, they would move at a higher speed.
BUT imagine, what if it is these lanes that contribute to the traffic? What if their solution is the problem itself?
Well then the argument would fall.
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