উদ্দীপক: Rayhan is a member of a cooperative society. A constitution is created with everyone's consensus to run the cooperative society. This constitution contains all the matters related to the management of the society, and as a result the society runs successfully. The activities of Rayhan's cooperative society resemble which method of constitution formulation?

• aRatification
• bDiscussion and consensus
• cRevolution
• dGradual evolution