please listen to the video in the website on the issue of social media and then answer the following questions(43秒-54秒）According to the lady, her attitude towards social media is

A、Negative,becausesocialmediaisharmfultoourhealth.
B、Positive,becausetherearebeneficialvideoswhichonecanlearnmorefromonlinecourses.
C、Negative,becausethereareendlessvideoswhichmightcauseaddictiveproblemsamongpeoplewhouseit.
D、Positive,becausethereareabundantresourceslikevideosthere.