vineet474 wrote:
maddy2u wrote:
Zebra mussels, a nuisance when they clog the intake pipes of nuclear power plants and water plants along the Great Lakes, have some redeeming qualities. Since the mussels feed voraciously on algae that they filter from the water that passes by them, bags of zebra mussels suspended in the discharge streams of chemical plants significantly improve water quality, even removing some hazardous waste.
Which one of the following is most strongly supported on the basis of the statements above, if they are true?
(A) Zebra mussels arrived in the Great Lakes on transatlantic freighters and, since they have no natural enemies there, are rapidly displacing the native species of clams.
(B) If the mussels spread to areas of the Mississippi River where native clams provide the basis for a cultured pearl industry, that industry will collapse, since the mussels are unsuitable for such use and would displace the clams.
(C) There is no mechanical means available for clearing intake pipes by scraping the mussels from them.
(D) The algae on which the mussels feed would, if not consumed by the mussels, themselves clog the intake pipes of nuclear power plants and water plants.
(E) Any hazardous waste the mussels remove from chemical-plant discharge will remain in the mussels, if they do not transform it, and they then must be regarded as hazardous waste.
A) Eliminate : Transatlantic freighters...new info
B) Eliminate : Mississippi River..new info
C) Eliminate : Clearing intake pipes..No mention of this has been made in the stimulus.
D) Eliminate : The algae on which the mussels feed would,
if not consumed by the mussels,
Bold part here is an assumption made... and hence this answer is incorrect as whatever is said in the stimulus is taken as TRUE.
E) Correct answer: Just an extension to the last line but not to a great extent. This seems pretty obvious.
Your suggestions are always welcomed.
Thanks,
-V
Feb seems to be a long time.. Am sorry for dropping in so late.. have a query regarding the explanation given by Vineet here...
Since option D was eliminated on the basis of it having an assumption "if not consumed..." in the option, option E also has a similar assumption " if they do not transform it" ... So why does this option be true instead of D??
Secondly, Manhattan review says that Draw a Conclusion question type,
requires us to find something that must be true according to the given premises, not
something that could be true or merely sounds reasonable. So in this case option E predicts by using the word "will" in its option.
So how is E, the correct answer choice???
Can anyone explain me the logic???
Thanks.