A 60-year-old male office worker presents to a clinic complaining of new onset of lower back pain ...

A 60-year-old male office worker presents to a clinic complaining of new onset of lower back pain that has been worsening over the last 6 weeks.
 
  The nurse knows which of the following components of his physical assessment and history is most indicative of a serious pathological process (like aortic aneurysm or cancer)?
  A)
  His pain is relieved by extended bed rest.
  B)
  When supine, passive rising of his leg to 90 degrees results in hamstring pain.
  C)
  He has needed regular nonsteroidal anti-inflammatory drugs to control the pain in recent weeks.
  D)
  His onset of pain has been gradual, and he has no prior history of lower back problems.