Correct Response: A. Studies have found that children in screen time reduction intervention groups had statistically significant decreases in body mass index. B is incorrect because, while a link via general improvements in physical fitness is possible, interventional studies have not been conducted to demonstrate any causal relationship. C is incorrect because bipolar disorder is a complex psychological diagnosis experienced by a subset of the population without obvious mechanistic or studied causal links to screen time (C). D is incorrect because improvements in healthy lifestyle choices may include, but don’t necessarily include, a more nutritious diet (D).
