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By restricting roads leading through residential areas to just private vehicles and commercial vehicles specifically authorized to travel through residential areas, most commercial traffic would be forced onto alternate routes. A reduction in the volume of commercial traffic would ease traffic gridlocks in residential areas.
The conclusion drawn in the argument depends on which of the following assumptions?
A) Alternate routes would be as suitable as the roads leading through residential areas for most drivers of commercial vehicles.
B) Most commercial vehicles that use the roads leading through residential areas are not authorized to travel through residential areas.
C) Most alternate routes are not suitable for private traffic
D) Private vehicles are at greater risk of getting caught in traffic gridlocks than are commercial vehicles.
E) Eventually, reduction in traffic gridlocks will lead to increases in private traffic.
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The passage speaks about the roads leading through residential areas and associated traffic issues. The roads are restricted, preventing the entry of unauthorised commercial vehicles. While the road remains open for all private vehicles and authorised commercial vehicles.
Because of this restriction, MOST commercial vehicles are forced to move through alternate route. The word : “ Forced” means making them to do it , even though they are not willing to do it. So, commercial vehicles are interested in road routes through residential areas only, but the restriction imposed have forced them to move through alternate routes.
The final conclusion is the reduction in commercial vehicle traffic volume will ease congestion of traffic.
We need to find an assumption: unstated premises which connects the logical gap. Secondly, when negated the conclusion should fall apart.
A) Alternate routes would be as suitable as the roads leading through residential areas for most drivers of commercial vehicles.
This cannot be true, as the context is not about the suitability of roads through residential areas. Moreover, the unauthorised commercial vehicles are forced to comply taking the alternate route. Hence, Wrong.
B) Most commercial vehicles that use the roads leading through residential areas are not authorized to travel through residential areas.Yes, this is the correct answer. The unstated point is most commercial vehicles previously plying through the residential area routes are not allowed to use these routes.
Negation test: IF MOST commercial vehicles are not restricted, then the reduction at traffic gridlocks would not occur. If the restriction is allowed , then this supports the aspect of easing traffic congestion through residential areas.
C) Most alternate routes are not suitable for private traffic.
The issue here being debated is specific to authorised and unauthorised commercial vehicles and their impact on traffic congestion.
D) Private vehicles are at greater risk of getting caught in traffic gridlocks than are commercial vehicles.
If traffic occurs, irrespective of the vehicle using those roads are affected. This option is completely irrelevant. Hence, Wrong.
E) Eventually, reduction in traffic gridlocks will lead to increases in private traffic.
When roads are free of traffic, there is a greater likelihood that the private traffic might increase. Which may or may not occur. Hence, Wrong.
Option B