OG详解-OG6 阅读 Q3

Choice B is the best answer because it most logically completes the text’s discussion about research into social media use. In context, “redressing” means remedying or compensating for. The text indicates that there is a long-standing trend of overemphasizing teenagers and young adults in studies of social media use. It goes on to say that scholars have recently broadened the kinds of social media users they study by including senior citizens. This suggests that scholars are redressing the long-standing trend of overemphasis on younger users by studying older users as well. 
Choice A is incorrect because “exacerbating” means making worse or aggravating, which would not make logical sense in context. Expanding the focus of studies of social media use to include senior citizens would not make the long-standing trend of overemphasizing teenagers and young adults in studies of social media use worse; instead, it would help to remedy this trend. Choice C is incorrect because “epitomizing” means illustrating or providing an example, which would not make logical sense in context. Expanding the groups of social mediausers that scholars study to include senior citizens would not provide an example of the long-standing trend of overemphasizing teenagers and young people in research on social media use. Choice D is incorrect because “precluding” means making impossible in advance or preventing, which would not make logical sense in context. The text indicates that there is a long-standing trend of overemphasizing teenagers and young adults in social media research. Expanding the focus of social media research to include senior citizens, as the text indicates scholars have begun to do, could help to rectify the trend, but it could not prevent the trend or make the trend impossible in advance, since the trend started long before scholars started expanding their focus.