A field experiment in which 6- to 9-year-old boys were given non-violent video games to play found that after 4 months of playing the games, the experimental group __________ compared to the control group.
A. did less reading and studying after school and had lower reading and writing scores in school
B. did more poorly on math but not reading
C. had both lower reading and writing scores and poorer math scores
D. showed no evidence that the video games displaced other activities
Answer: A
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