Which short scenario best describes organizational citizenship behaviour?

A) Joe,a shop mechanic,approaches management with an initiative that will improve customer service.
B) Duane,a faculty member,starts and finishes his lectures on time as per his syllabus.
C) Mary,a university graduate,was so impressed with company ABC that she decided to join the company.Ten years later she was still working for ABC.
D) Carlos "volunteers" for special community events on behalf of his company only when he is paid overtime.

Organizational citizenship behavior refers to discretionary behaviors that are not part of an employee's formal job description but contribute to the effective functioning of the organization. Joe, by initiating an improvement in customer service, is exhibiting such behavior. Option B refers to job performance, not citizenship behavior. Option C is an indication of employee loyalty, but not necessarily citizenship behavior. Option D involves a reward for participating in community events, which is not an example of voluntary citizenship behavior.