Final answer:
The Greasers follow the 'Rule of Respect' which likely developed as a code of conduct to affirm unity and resist societal pressures similar to factors in Asch's study on conformity.
Step-by-step explanation:
The Greaser's rule, besides "stick together," is B. Rule of Respect. This rule reflects the culture and environment the Greasers live in—an environment where they often feel disrespected by society and other groups like the Socs. Therefore, it's important for them to maintain a level of respect within their own group. As for how these rules came to be, they likely evolved as a code of conduct to ensure unity and stability within the group, especially when facing outside challenges. In situations akin to Asch's study on conformity, having an ally and being able to keep answers private were critical factors in resisting the pressure to conform, thereby strengthening the internal rules and solidarity among the Greasers.