I believe the answer is: D.<span>. openly known and easily stated by most citizens
According to Edward, these rules usually would be introduced by each members of the social group right before they become the member of that social group. Examples of such rules are the employee orientation that companies do for new recruits.</span>
D. A plateau period means that there is no change, bad or good. Options A-C are exciting changes, meaning there is an uphill change. However in D, nothing is changing at all.