What Important Notion Came Out of the Minimal Groups Studies

Multiple Choice

What important notion came out of the minimal groups studies by Tajfel and Turner in the 1970s?

A) Reward was necessary to create ingroup favoritism.
B) Competition was not necessary to create ingroup favoritism.
C) History of previous conflict was necessary to create ingroup favoritism.
D) When participants were asked to serve as resource allocators, this request erased any ingroup favoritism they may have shown to their own groups.