What makes ethical dilemmas, unfortunately, something that social workers frequently encounter? ...

What makes ethical dilemmas, unfortunately, something that social workers
  frequently encounter?
 
  a. Clients of social workers tend to be very opinionated with their beliefs and
  views and often disagree with the social worker regarding these
  b. Social workers are placed in authoritarian positions in their practice with
  clients
  c. The complexity of social work practice and the limits of available resources
  d. Difficulties reaching mutual agreements between social workers and clients
  regarding personal and professional choices and values