IMO - ANS is C -
Question asked us to evaluate if conc is correct or not ?
Conc - "Heavy daily screen contributes to vision impairment"
So if we get any other reason other than screen time we get some confidence that this is true or not.
Option C - Directly says if we have any other reason habit to cause this if yes then our conc is wrong if no then our conc is right so this is answer choice that I feel is correct.
Why other options wrong in my view -
A - if highest pressure then they already have issues that doesn't proof anything on screen time is causing this issue or not Irrelevant in my view.
B - its says can we say pressure is reliable parameter if not the reliable then also our conc is on heavy usage of screen so this related in some sense but not that convincing for me.
D - It says any exception where pressure is increased but screen time is less - so this can be happen but if any or any exception it won't help for generic conculsion.
E - So again it is similar to option B, here it says eye vision doesn't have any significant value - similar to B option unreliable parameter but it doesn't attack our conc which is based on heavy usage of screen and pressure issue logic is premise so we need to find any option choice that says screen time is not the issue or it is the issue.
Option C says the same to evaluate - it says any other cause other than screen time? so it is correct ans in my view
Thanks!
Bunuel
In a study, researchers repeatedly measured the intraocular pressure of thousands of teenage volunteers over four years. The researchers found that intraocular pressure increased more quickly in teenagers who used screens for more than six hours per day. Since elevated intraocular pressure is associated with vision impairment, the researchers concluded that heavy daily screen use contributes to vision impairment.
In order to assess the force of the researchers' evidence for their conclusion, it would be most helpful to know whether
(A) among volunteers whose intraocular pressure was highest at the end of the study, most had already had elevated readings at the start
(B) intraocular pressure is a reliable indicator of overall visual system health compared with other eye measurements
(C) any other habits common among teenagers who use screens for more than six hours per day also tend to cause intraocular pressure to increase more quickly
(D) any of the volunteers whose intraocular pressure increased during the study used screens for fewer than six hours per day
(E) vision impairment can result from factors that do not involve elevated intraocular pressure
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