How do common factors promote organizational change?

How do common factors promote organizational change?
 
  a. As in work with clients, social workers with change promoting attributes and
  ways of relating to others create ongoing opportunities within organizations
  for change work to take place
  b. They do not promote organizational change because they are only meant to
  be used between the social worker and the client
  c. By helping the social worker with evaluation of their agency or organization in
  a way that can help it develop
  d. Use of common factors in organizations assure that no one does anything
  uncommon