MrsSmith, 75 Years Old, Reports That She Is Weak, Has

Mrs.Smith, 75 years old, reports that she is weak, has difficulty urinating, and is dehydrated.Although she is afebrile, the nurse conducts a thorough physical examination, including urinalysis and complete blood count (CBC) .The total assessment is necessary because:

A) All body systems interact, and symptoms could indicate a variety of diagnoses.
B) The symptoms are vague and may be signs of aging.
C) There may be other signs or symptoms more indicative of the condition.
D) Mrs.Smith may not be reporting all significant information.