After a number of migrant fishermen at the Rotunda Beach pier got sick from consuming locally fished hermit crabs, the Rotunda Beach city authorities posted signs cautioning against the consumption of the crabs. Tests revealed that the crabs were high in prestic acid, a dangerous chemical. But a marked decline in the number of goldfish found by the beach has led to the removal of the warning signs.
Premise: High prestic Acid in Hermit crab =>People got sick => Caution signs against Hermit Crabs
Conclusion: Decline in GF => Removal of signs.Now how does conclusion is linked with premise in the stimulus , is what we have to answer .Because conclusion mentions GF and premise mentions HC.So there must be some relation between GF and prestic acid.
Which of the following, if true, would best explain the removal of the signs?
Goldfish found off Rotunda Beach cause hermit crabs to excrete prestic acid.This shows that signs shouldn't be removed because GF decline =>HC will less excrete prestic acid => People Sick
The amount of prestic acid produced by an individual goldfish has a direct positive correlation with the density of the goldfish population in that goldfish’s immediate vicinity.If Density of GF directly proportional to the Prestic acid , the according to conclusion
GF decline => Density of GF declines => Less Prestic acid => HC safe =>People will not get sick => Removal of signs.
Goldfish consume various parasites that often contain prestic acid.Out of scope, we talking about Acid not parasites
Rotunda Beach is notoriously polluted.Out of scope
Goldfish would not be able to inhabit the waters off Rotunda Beach if those waters were not saturated with a precise mixture of acids, including prestic acid.Not related to argument
Hope it helps !!!
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