It is currently 18 Nov 2017, 18:37

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

The level of lead contamination in United States riv- ers

Author Message
Senior Manager
Joined: 19 Feb 2004
Posts: 413

Kudos [?]: 39 [0], given: 0

Location: Lungi

Show Tags

08 Apr 2004, 04:10
00:00

Difficulty:

(N/A)

Question Stats:

100% (00:54) correct 0% (00:00) wrong based on 1 sessions

HideShow timer Statistics

15. The level of lead contamination in United States riv-
ers declined between 1975 and 1985. Federal regula-
tions requiring a drop in industrial discharges of lead
went into effect in 1975, but the major cause of the decline was a 75 percent drop in the use of leaded gasoline between 1975 and 1985.

Which of the following, if true, best supports the
claim that the major cause of the decline in the level
of lead contamination in United States rives was
the decline in the use of leaded gasoline?
(A) The level of lead contamination in United States
rivers fell sharply in both 1975 and 1983.
(B) Most of the decline in industrial discharges of
lead occurred before 1976, but the largest
decline in the level of river contamination
occurred between 1980 and 1985.
(C) Levels of lead contamination in rivers fell
sharply in 1975-1976 and rose very slightly
over the next nine years.
(D) Levels of lead contamination rose in those rivers
where there was reduced river flow due to drought.
(E) Although the use of leaded gasoline declined
75 percent between 1975 and1985, 80 percent
of the decline took place in 1985.

Kudos [?]: 39 [0], given: 0

Senior Manager
Joined: 30 Aug 2003
Posts: 318

Kudos [?]: 29 [0], given: 0

Location: dallas , tx

Show Tags

08 Apr 2004, 10:46
confused bwt B and E .. but B seems better.
_________________

shubhangi

Kudos [?]: 29 [0], given: 0

Senior Manager
Joined: 05 Feb 2004
Posts: 290

Kudos [?]: 6 [0], given: 0

Location: USA

Show Tags

08 Apr 2004, 10:54
E seems tooo direct..........so would pick B!!

Kudos [?]: 6 [0], given: 0

Senior Manager
Joined: 19 Feb 2004
Posts: 413

Kudos [?]: 39 [0], given: 0

Location: Lungi

Show Tags

10 Apr 2004, 12:16
OA is B.

Kudos [?]: 39 [0], given: 0

Senior Manager
Joined: 07 Oct 2003
Posts: 349

Kudos [?]: 21 [0], given: 0

Location: Manhattan

Show Tags

12 Apr 2004, 15:41
can someone post their line of reasoning?

Kudos [?]: 21 [0], given: 0

12 Apr 2004, 15:41
Display posts from previous: Sort by

The level of lead contamination in United States riv- ers

Moderators: GMATNinjaTwo, GMATNinja

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.