In 1986, the city of Los Diablos had 20 days on which air : GMAT Critical Reasoning (CR)
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 23 Jan 2017, 00:14

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# In 1986, the city of Los Diablos had 20 days on which air

Author Message
TAGS:

### Hide Tags

GMAT Club Legend
Joined: 07 Jul 2004
Posts: 5062
Location: Singapore
Followers: 30

Kudos [?]: 358 [0], given: 0

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

### Show Tags

05 Sep 2005, 07:43
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

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.
If you have any questions
New!
Manager
Joined: 15 Aug 2005
Posts: 179
Followers: 1

Kudos [?]: 5 [0], given: 0

### Show Tags

05 Sep 2005, 08:29
D for me.

Rest all seem to strengthen the argument.

Krishna
Manager
Joined: 04 Sep 2005
Posts: 142
Location: Fringes of the Boreal, Canada
Followers: 1

Kudos [?]: 17 [0], given: 0

### Show Tags

05 Sep 2005, 10:55
D sounds good.
Intern
Joined: 30 Aug 2005
Posts: 8
Followers: 0

Kudos [?]: 0 [0], given: 0

### Show Tags

06 Sep 2005, 02:38
I go for E

(E) Excess ozone and carbon monoxide require a minimum of two years to break down naturally in the atmosphere above a given area.
Senior Manager
Joined: 22 Jun 2005
Posts: 363
Location: London
Followers: 1

Kudos [?]: 11 [0], given: 0

### Show Tags

06 Sep 2005, 03:38
I'll choose D
Manager
Joined: 28 Jun 2005
Posts: 217
Followers: 1

Kudos [?]: 5 [0], given: 0

### Show Tags

06 Sep 2005, 04:41
It should be B; If more accurate device is invented the pollution level should go up instead it went down
GMAT Club Legend
Joined: 07 Jul 2004
Posts: 5062
Location: Singapore
Followers: 30

Kudos [?]: 358 [0], given: 0

### Show Tags

06 Sep 2005, 06:06
OA is B.
Senior Manager
Joined: 13 Jan 2005
Posts: 331
Followers: 1

Kudos [?]: 2 [0], given: 12

### Show Tags

06 Sep 2005, 10:07
B.

GA
Manager
Joined: 28 Jan 2004
Posts: 200
Location: Ghana
Followers: 1

Kudos [?]: 8 [0], given: 0

### Show Tags

07 Sep 2005, 05:56
gotoknow3 wrote:
It should be B; If more accurate device is invented the pollution level should go up instead it went down

I initially chose E, but i think your explanation is good.
However, isn't it the case that the inaccuracy of the gas spectrometer can result in distortions in both directions?
_________________

It's not over until it's OVER!

07 Sep 2005, 05:56
Similar topics Replies Last post
Similar
Topics:
23 In 1986, the city of Los Diablos had 20 days on which air 62 12 May 2009, 22:07
In 1986, the city of Los Diablos had 20 days on which air 6 03 Jul 2008, 20:02
In 1986, the city of Los Diablos had 20 days on which air 2 22 Apr 2008, 19:11
In 1986, the city of Los Diablos had 20 days on which air 13 17 Jan 2008, 16:49
In 1986, the city of Los Diablos had 20 days on which air 17 07 Jun 2007, 21:23
Display posts from previous: Sort by