How Do Physicians Diagnose a ʺColles Fractureʺ of the Radius

How do physicians diagnose a ʺColles fractureʺ of the radius (fracture near the distal epiphysis) using surface anatomy?

A) They palpate the styloid process of the radius and find that it has moved proximally from its normal position.
B) They ask the patient to flex the forearm against resistance and then look for any bulges that formed.
C) They extend the forearm, place three fingers in the lateral dimple, and ask the patient to rotate the hand as if turning a doorknob.
D) They ask the patient to extend the thumb of the affected hand and to point it posteriorly, and then they look for the formation of a triangle on the back of the hand.