题目

B A new study suggests that the more teenagers watch television , the more likely they are to develop depression (抑郁)as young adults. But the extent to which TV may or may not be to blame is a question that the study leaves unanswered. The researchers used a national long-term survey of adolescent health to investigate the relationship between media use and depression . They based their findings on more than four thousand adolescents who were not depressed when the survey began in 1995. As part of the survey, the young people were asked how many hours of television or videos they watched d若将函数f(x)=Asin(ωx+π6)(A＞0，ω＞0)的图象向左平移π6个单位得到的图象关于y轴对称，则ω的值可能为（　　）A．2B．3C．4D．6