The correct answer is B) pop culture.
The term that describes this scenario that historians could use to understand this event in society is pop culture.
Popular culture or "pop culture" is the kind of values, customs, and new traditions of mass society transmitted by mass media such as TV or the internet. This information mostly aims young people or teenagers that spend much of its time using social media and like to follow trends, such as the "ALS bucket challenge," or other tendencies that go viral.