General Medicine General ffd3ce02 Which of the following would make the most sense as a more specific diagnostic test of shock? A A CSF (spinal) tap to check for meningitis. B A brainstem auditory evoked response test to see if the person can hear ok. C A pupillary light reflex test to check how well the eyes are working. D The measurement of serum lactate, elevated levels of which are an indicator of shock.