Select the correct answer.

In 2014, the ALS Ice Bucket Challenge swept through social media. People posted videos of themselves dumping buckets of ice-cold water on their heads to raise awareness and funds for ALS, a disease that affects nerve cells in the brain and spinal cord. The stunt became an idea that swept through mainstream America and was influenced by the media. Which term describes this scenario that historians could use to understand this event in society?

A. propaganda
B. pop culture
C. historical context
D. hypothesis
E. high culture