Which contains the most accurate explanation of how social media shapes popular opinion? Instagram images of the massacre of civilians in Georgia by Russian troops caused global public opinion to turn against Russian President Vladimir Putin A Facebook stream of the killing of an unarmed black man by a white police officer in Ferguson, MO caused riots and protests A video tweet of the assassination of the Ukrainian President Victor Yanukovych caused global popular opinion to shift against Ukrainian protestors. YouTube videos of civilian victims of chemical warfare in Syria turned public opinion against the Assad regime.

The most accurate explanation of how social media shapes popular opinion is that YouTube videos of civilian victims of chemical warfare in Syria turned public opinion against the Assad regime. Social media platforms have the power to disseminate information quickly and widely, often with emotional impact. In this case, the videos of civilian victims of chemical warfare in Syria were widely shared on social media, leading to a shift in global public opinion against the Assad regime. This highlights the role of social media in shaping popular opinion by providing visual and emotional content that can influence people's perceptions and attitudes.