How do social workers work on the common factors?

How do social workers work on the common factors?
 
  a. Social workers hope that clients will read this textbook and eventually take it
  upon themselves to discuss the presence/absence of common factors in their
  work with them
  b. Social workers have their supervisors conduct the session to work on the
  common factors with clients while the social worker is in another room
  c. Social workers may have to shift from discussions on client problems to
  explicitly discussing the issues relating to challenges in their work
  d. They give clients an informational DVD on common factors and ask that after
  clients watch it, they try to incorporate more of the common factors in their
  work with the social worker