问题详情

From paragraph 6 we may infer that one of the effective measures suggested by Ludnik to pre-vent children from being obese would be___________
A. not to permit them to watch TV at all
B. to tell them to spend less time watching TV
C. to turn off TV when they are in front of TV sets
D. to calculate accurately the time that a child spends watching TV请帮忙给出正确答案和分析，谢谢！