Which of the Following Describes the Changes in Prejudice Between

Which of the following describes the changes in prejudice between groups over the course of the Robber's Cave study

A) Groups reduced prejudice when competing or cooperating, but increased prejudice when having neutral contact.
B) Groups developed prejudice when competing. Neutral contact did not significantly mitigate the prejudice. Cooperating on shared goals reduced the prejudice.
C) Groups developed prejudice when competing. Neutral contact significantly mitigated the prejudice. Cooperating on shared goals slightly reduced the prejudice.
D) Groups increased prejudice when competing, and increased again when cooperating, but the prejudice reduced during "cooling off periods" of neutral.