Official Solution:
The executive committee of the shopping mall announced yesterday it will partner with city police to add more officers to the mall security force for the holiday shopping season. The mall security team, which consists of 10 officers, was deemed too small to keep shoppers safe after there were 44 armed robberies in the parking lot during last year's season. Almost all additional officers will patrol the north parking lot, chosen because it receives the heaviest shopper traffic.
Which of the following, if true, most strongly suggests that concentrating most additional officers in the north parking lot will not reduce robberies?
A. Retailers expect this to be one of the busiest shopping seasons yet, drastically increasing the number of people in mall parking lots.
B. Police reports from the previous year show that most of the robberies occurred in the south parking lot.
C. Some officers in the north parking lot will be directing traffic rather than patrolling.
D. Security cameras have been installed on light posts in all parking lots, in the hopes of identifying armed robbers.
E. There are a large number of entrances and exits to the parking lots, making isolating suspect cars difficult.
Situation: A shopping mall will increase its security force in the hopes of deterring parking lot robberies. Note that the goal is to reduce the robberies (deter them per the question) not catch as many robbers as possible. While catching criminmals could likely be an effective deterrent in itself, having a police officer simply stand on a corner would also suffice.
Reasoning: Which point most undermines the plan to deter crime in the mall parking lot? The executive committee plans not only to increase the number of security officers, but also to station most of the total force in the north parking lot, where there is the most traffic from shoppers. If, however, the north parking lot is not the most dangerous area around the mall, then the plan will most likely fail.
A. This statistic is relevant to the need for police protection for larger crowds, but does not address the soundness of the plan.
B. CORRECT. If the plan does not include increased police presence in the area that last year was most dangerous, then it most likely will not succeed.
C. The officers directing traffic will still constitute a police presence capable of deterring crime.
D. Our goal is to weaken the plan to deter crime. This answer choice is the opposite of what we need. Not only do we get officers on the ground, but now we have extra cameras, so the chances of deterring crime have gone up. Thus this is not a criticism to the plan. I don't think anyone can argue that adding the police force will be a bad idea when it comes to crime deterrence since they can work in a complimenting way - cameras can identify suspects and officers can respond and react more proactively. Crime is going down, not up. Eliminate.
E. The fact that there are many entrances and exits which make isolating suspect cars difficult is not relevant ot our argument (at least from the GMAT standpoint) for a few reasons. First, criminals come in all shapes and sizes - what if they come on foot or on a scooter? Why are we only targetting those who are driving a car? Second, how would an officer who is patrolling on foot be isolating cars? Third, we are not interested in catching criminals or pursuing them and having a shootout in the parking lot - that's not good for busines. We just want to reduce crime by deterring criminals, and the best deterrent is a security guard or an officer stationed at the parking lot who would either intervene or note down the suspect details in case a ciminal act is taking place.
Answer: B