What should social workers do to effectively respond when one or more participants lack sufficient ...

What should social workers do to effectively respond when one or more participants
  lack sufficient motivation at some point of the work?
 
  a. Model motivation to engage in the work so the participants can assess and
  evaluate their own motivation
  b. State your observations to the participants regarding whether or not they are
  engaging in the work and how they seem to be lacking motivation
  c. Provide feedback to the participants on how you feel the work is going and
  what you think is necessary to increase the engagement in
  d. Seek to understand what motivational aspect is missing or insufficiently
  present and what factors are keeping that in place