Question

consider this claim: you should avoid using electronic screens before you go to sleep. which piece of evidence better supports this claim? evidence a: looking at devices like tvs and smartphones before bed can disrupt your sleep. harvard university researchers found that the screens artificial blue light shifts sleeping times later by twice as much as other light. evidence b: many doctors recommend using apps that adjust or reduce the light that electronic screens give off. the blue light from screens can cause eyestrain or headaches and can throw off your bodys natural daily rhythm.

Explanation:

Evidence A cites a specific research - Harvard University researchers found blue light from screens shifts sleeping times more than other light, directly relating to sleep disruption which supports the claim about avoiding screens before sleep. Evidence B mentions eye - strain, headaches and disruption of body rhythm but is more general and also includes doctor recommendations about apps rather than a direct link to sleep disruption like Evidence A.

Answer:

Evidence A