Answer: B) elevating his lower extremities.
Step-by-step explanation:
Shock is the response of the body towards the sudden drop in the blood pressure inside the blood vessels. The body responds to the shock by showing constriction of the blood vessels in the extremities such as feet and hand. This phenomena is called as vasoconstriction, this process conserve the blood flow to the vital organs of the body so that the vital signs may remain active.
Elevating the lower extremities can be useful to judge the constriction of blood vessels in them especially in feet. Thus this can be indicative of shock.