A client who has been taking prescription medication to treat insomnia for an agreed-upon trial ...

A client who has been taking prescription medication to treat insomnia for an agreed-upon trial period asks about remaining on the medication long-term for treatment of chronic insomnia.
 
  Your answer is MOST accurately based on which of the following? a. Long-term use of medications is the only proven effective treatment for insomnia.
  b. All medications prescribed to treat insomnia are studied over several years' continuous use.
  c. There is little data supporting the use of medications long-term for treatment of insomnia.
  d. The Food and Drug Administration (FDA) does not approve medications unless they are safe for long-term use.