In 1986, the city of Los Diablos had 20 days on which air : GMAT Critical Reasoning (CR)
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# In 1986, the city of Los Diablos had 20 days on which air

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VP
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In 1986, the city of Los Diablos had 20 days on which air [#permalink]

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03 Jul 2008, 20:02
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1. In 1986, the city of Los Diablos had 20 days on which air pollution reached unhealthful amounts and a smog alert was put into effect. In early 1987, new air pollution control measures were enacted, but the city had smog alerts on 31 days that year and on 39 days the following year. In 1989, however, the number of smog alerts in Los Diablos dropped to sixteen. The main air pollutants in Los Diablos are ozone and carbon monoxide, and since 1986 the levels of both have been monitored by gas spectrography.
Which of the following statements, assuming that each is true, would be LEAST helpful in explaining the air pollution levels in Los Diablos between 1986 and 1989?
(A) The 1987 air pollution control measures enacted in Los Diablos were put into effect in November of 1988.
(B) In December of 1988 a new and far more accurate gas spectrometer was invented.
(C) In February of 1989, the Pollution Control Board of Los Diablos revised the scale used to determine the amount of air pollution considered unhealthful.
(D) In 1988 the mayor of Los Diablos was found to have accepted large campaign donations from local industries and to have exempted those same industries from air pollution control measures.
(E) Excess ozone and carbon monoxide require a minimum of two years to break down naturally in the atmosphere above a given area.
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03 Jul 2008, 20:28
goalsnr wrote:
1. In 1986, the city of Los Diablos had 20 days on which air pollution reached unhealthful amounts and a smog alert was put into effect. In early 1987, new air pollution control measures were enacted, but the city had smog alerts on 31 days that year and on 39 days the following year. In 1989, however, the number of smog alerts in Los Diablos dropped to sixteen. The main air pollutants in Los Diablos are ozone and carbon monoxide, and since 1986 the levels of both have been monitored by gas spectrography.
Which of the following statements, assuming that each is true, would be LEAST helpful in explaining the air pollution levels in Los Diablos between 1986 and 1989?
(A) The 1987 air pollution control measures enacted in Los Diablos were put into effect in November of 1988.
(B) In December of 1988 a new and far more accurate gas spectrometer was invented.
(C) In February of 1989, the Pollution Control Board of Los Diablos revised the scale used to determine the amount of air pollution considered unhealthful.
(D) In 1988 the mayor of Los Diablos was found to have accepted large campaign donations from local industries and to have exempted those same industries from air pollution control measures.
(E) Excess ozone and carbon monoxide require a minimum of two years to break down naturally in the atmosphere above a given area.

I pick D. One would expect that the mayor's action would increase pollution, not decrease it as indicated in the stimulus.
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03 Jul 2008, 21:04
hl1711 wrote:
goalsnr wrote:
1. In 1986, the city of Los Diablos had 20 days on which air pollution reached unhealthful amounts and a smog alert was put into effect. In early 1987, new air pollution control measures were enacted, but the city had smog alerts on 31 days that year and on 39 days the following year. In 1989, however, the number of smog alerts in Los Diablos dropped to sixteen. The main air pollutants in Los Diablos are ozone and carbon monoxide, and since 1986 the levels of both have been monitored by gas spectrography.
Which of the following statements, assuming that each is true, would be LEAST helpful in explaining the air pollution levels in Los Diablos between 1986 and 1989?
(A) The 1987 air pollution control measures enacted in Los Diablos were put into effect in November of 1988.
(B) In December of 1988 a new and far more accurate gas spectrometer was invented.
(C) In February of 1989, the Pollution Control Board of Los Diablos revised the scale used to determine the amount of air pollution considered unhealthful.
(D) In 1988 the mayor of Los Diablos was found to have accepted large campaign donations from local industries and to have exempted those same industries from air pollution control measures.
(E) Excess ozone and carbon monoxide require a minimum of two years to break down naturally in the atmosphere above a given area.

I pick D. One would expect that the mayor's action would increase pollution, not decrease it as indicated in the stimulus.

For me, the answer is B. Question is asking to find a choice that is least helpful to explain the situation. If B is true, then probably more cases were found in 1989.
VP
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03 Jul 2008, 21:17
clubzzang wrote:
hl1711 wrote:
goalsnr wrote:
1. In 1986, the city of Los Diablos had 20 days on which air pollution reached unhealthful amounts and a smog alert was put into effect. In early 1987, new air pollution control measures were enacted, but the city had smog alerts on 31 days that year and on 39 days the following year. In 1989, however, the number of smog alerts in Los Diablos dropped to sixteen. The main air pollutants in Los Diablos are ozone and carbon monoxide, and since 1986 the levels of both have been monitored by gas spectrography.
Which of the following statements, assuming that each is true, would be LEAST helpful in explaining the air pollution levels in Los Diablos between 1986 and 1989?
(A) The 1987 air pollution control measures enacted in Los Diablos were put into effect in November of 1988.
(B) In December of 1988 a new and far more accurate gas spectrometer was invented.
(C) In February of 1989, the Pollution Control Board of Los Diablos revised the scale used to determine the amount of air pollution considered unhealthful.
(D) In 1988 the mayor of Los Diablos was found to have accepted large campaign donations from local industries and to have exempted those same industries from air pollution control measures.
(E) Excess ozone and carbon monoxide require a minimum of two years to break down naturally in the atmosphere above a given area.

I pick D. One would expect that the mayor's action would increase pollution, not decrease it as indicated in the stimulus.

For me, the answer is B. Question is asking to find a choice that is least helpful to explain the situation. If B is true, then probably more cases were found in 1989.

IIf B is true, then probably more cases were found in 1989
If B is true and hence more cases were found in 1989 then it must be a import reason not a least important one. The answer is correct but the logic is flawed .
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03 Jul 2008, 22:35
goalsnr wrote:
clubzzang wrote:

For me, the answer is B. Question is asking to find a choice that is least helpful to explain the situation. If B is true, then probably more cases were found in 1989.

IIf B is true, then probably more cases were found in 1989
If B is true and hence more cases were found in 1989 then it must be a import reason not a least important one. The answer is correct but the logic is flawed .

B because it says a gas spectrometer was invented but tells nothing about whether it got used by the city.
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03 Jul 2008, 22:37
alpha_plus_gamma wrote:
goalsnr wrote:
clubzzang wrote:

For me, the answer is B. Question is asking to find a choice that is least helpful to explain the situation. If B is true, then probably more cases were found in 1989.

IIf B is true, then probably more cases were found in 1989
If B is true and hence more cases were found in 1989 then it must be a import reason not a least important one. The answer is correct but the logic is flawed .

B because it says a gas spectrometer was invented but tells nothing about whether it got used by the city.

Bingo!!!
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03 Jul 2008, 22:41
deleted...sorry...
Re: CR-Los Diablos   [#permalink] 03 Jul 2008, 22:41
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