How might you introduce the topic of evaluating practice with a client with whom the work is ...

How might you introduce the topic of evaluating practice with a client with whom the
  work is proceeding slowly?
 
  a. Tell them they need to start working harder at achieving success in their life
  and hope they pick up on indirect messages you are sending them
  b. Inform them that you might not work with them any longer because the work
  is going so slowly
  c. Suggest to the client that you would like them to get the very most out of
  your work together and so would like to talk about ways in which you might
  help them more effectively
  d. Talk to them about how they might be purposely sabotaging their success in
  their work