Scientists wishing to understand the kinetic movements of an

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Scientists wishing to understand the kinetic movements of ancient dinosaurs are today studying the movements of modern day birds, which many scientists believe are descended from dinosaurs. A flaw in this strategy is that birds, although once genetically linked to dinosaurs, have evolved so far that any comparison is effectively meaningless

Which of the following, if true, would most weaken the criticism made above of the scientists' strategy?


(A) Birds and dinosaurs have a number of important features in common that exist in no other living species.

(B) Birds are separated from dinosaurs by 65 million years of evolution.

(C) Our theories of dinosaur movements have recently undergone a radical reappraisal.

(D) The study of kinetic movement is a relatively new discipline.

(E) Many bird experts do not study dinosaurs to draw inferences about birds


OA A

Source: Princeton Review
Source: — Critical Reasoning |

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by deloitte247 » Fri Aug 23, 2019 8:38 am

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We need to find what weakens the criticism made of the scientist's strategy.
Premise: Scientists believe birds descended from dinosaurs.

OPTION A - CORRECT
This opposes the claim that comparison is effectively meaningless between the bird and the dinosaurs. Due to the number of features in common between the bird and the dinosaurs, it shows that modern-day birds can be studied to understand the kinetic movement of dinosaurs.

OPTION B - INCORRECT
If true, it supports the argument through the claim that birds have evolved so far.

OPTION C - INCORRECT
If true, this doesn't weaken the argument in any way.

OPTION D - INCORRECT
If true that the study of kinetic energy is a new discipline, it doesn't explain why many scientists believe that birds descended from dinosaurs.

OPTION E - INCORRECT
This doesn't really refer to the scientist's strategy, so it can't weaken the argument.