A Patient Often Experiences Numbness and Pain in the Thumb

Multiple Choice

A patient often experiences numbness and pain in the thumb and first two fingers on his right hand.He goes to the doctor,who suspects that carpal tunnel syndrome is the reason for the numbness and pain.The doctor then orders a simple test to see how fast nerve impulses are moving up and down the patient's arm.The doctor's preliminary diagnosis of carpal tunnel syndrome is a(n)

A) theory.
B) fact.
C) experiment.
D) hypothesis.