Thousands of UCLA students used to gather several times a year for an "undie run" as a way of relieving stress during finals until it was canceled due to safety concerns in 2009. Of what is this an example?

A) emergent norms
B) a public goods dilemma
C) the tragedy of the commons
D) collective behavior

Undie Run

A public event where participants run in their underwear to raise awareness for a cause or simply for fun.

Emergent Norms

Social behavior norms that develop during events where existing cultural norms do not apply or are unclear.

Collective Behavior

Actions and phenomena that emerge suddenly in a social context, distanced from well-established norms or conventions.