A nurse is assessing a client who is experiencing occasional feelings of sadness because of the ...

A nurse is assessing a client who is experiencing occasional feelings of sadness because of the recent death of a beloved pet. The client's appetite, sleep patterns, and daily routine have not changed.
 
  How should the nurse interpret the client's behaviors? A. The client's behaviors demonstrate mental illness in the form of depression.
  B. The client's behaviors are extensive, which indicates the presence of mental illness.
  C. The client's behaviors are not congruent with cultural norms.
  D. The client's behaviors demonstrate no functional impairment, indicating no mental illness.