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 Your Progress
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
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
Register for the GMAT Club Virtual MBA Spotlight Fair – the world’s premier event for serious MBA candidates. This is your chance to hear directly from Admissions Directors at nearly every Top 30 MBA program..
TTP GMAT OnDemand gives serious students 400+ hours of expert video instruction, the full TTP course, AI support, weekly office hours, and a 715+ score guarantee—all built for elite GMAT score improvement.
Master the GMAT with expert live instruction, a personalized study plan, and real-time support. Includes 40 hours of online classes plus 6 months of access to the TTP GMAT OnDemand video course. Class date: Mon/Wed June 22, 2026 →August 26, 2026
One tank in a fish-farming system has been contaminated by a rapidly reproducing species of algae that kills fish by drastically reducing water circulation. If the owners of the fish farm do nothing to rid the tank of these algae, all of the fish in the system will die.
Which of the following, if true, would most damage the conclusion above?
A. The species of fish in the tank produces waste containing bacteria that will destroy the algae before the algae reach the other tanks.
B. Some of the algae in the contaminated tank will die before reproducing.
C. The species of algae in the tank is a favorite food of Atlantic salmon.
D. There is no effective method of ridding the contaminated tank of algae.
E. All species of algae convert carbon dioxide to oxygen, a function vital to fish life.
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
Why is E wrong ??
Also, please do let me know whether my reasons given below are fine as for rejecting the choice?
rahulraao
One tank in a fish-farming system has been contaminated by a rapidly reproducing species of algae that kills fish by drastically reducing water circulation. If the owners of the fish farm do nothing to rid the tank of these algae, all of the fish in the system will die.
Which of the following, if true, would most damage the conclusion above?
A. The species of fish in the tank produces waste containing bacteria that will destroy the algae before the algae reach the other tanks.
B. Some of the algae in the contaminated tank will die before reproducing.
***The others that survive may reproduce enough numbers. This still supports the conclusion.
C. The species of algae in the tank is a favorite food of Atlantic salmon.
***Out of scope
D. There is no effective method of ridding the contaminated tank of algae.
***If there is no effective method, there may exist some crude method which can still prevent other fish in the system from dying. The farmers may follow that method.
E. All species of algae convert carbon dioxide to oxygen, a function vital to fish life.
Why is E wrong ?? Also, please do let me know whether my reasons given below are fine as for rejecting the choice?
rahulraao
One tank in a fish-farming system has been contaminated by a rapidly reproducing species of algae that kills fish by drastically reducing water circulation. If the owners of the fish farm do nothing to rid the tank of these algae, all of the fish in the system will die.
Which of the following, if true, would most damage the conclusion above?
A. The species of fish in the tank produces waste containing bacteria that will destroy the algae before the algae reach the other tanks.
B. Some of the algae in the contaminated tank will die before reproducing.
***The others that survive may reproduce enough numbers. This still supports the conclusion.
C. The species of algae in the tank is a favorite food of Atlantic salmon.
***Out of scope
D. There is no effective method of ridding the contaminated tank of algae.
***If there is no effective method, there may exist some crude method which can still prevent other fish in the system from dying. The farmers may follow that method.
E. All species of algae convert carbon dioxide to oxygen, a function vital to fish life.
Show more
All E says is that the algae produces oxygen which is vital to fish life. However, this does not counter the argument that the algae hurts water circulation thus killing the fishes. A however says the algae can be broken down, and so the problem posed by the algae is no longer present.
A here. Nothing else comes close enough to damaging the conclusion. If the algae is stopped before circulating than it won't cause the deaths of the fish at the farm.
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.