If you do not have a commercial tourniquet available, what common device found on the ambulance be used as a substitute?

a) ice packs tied in place with triangle bandage
b) air or vacuum splint
c) blood pressure cuff
d) use a rope tie-down to make a tourniquet

c.

Explanation:

If a special tourniquet is not available, such as those that come in first aid kits, it is possible to improvise using soft, strong and flexible material, such as gauze, bandage, clothing or handkerchiefs, in order not to cause damage to the skin, making sure that the tourniquet has a minimum width of one inch to tighten.

C. Blood pressure cuff.

Explanation:

A blood pressure cuff is used to take blood pressure. The cuff has an inflatable rubber bladder that is fastened around the arm.

the last statement is correct i.e.

when your heart is not pumping enough blood around your body because your heart is severely failing, you may need an artificial heart. an artificial heart is a mechanical device, about the size of an orange, that is connected to your heart or implanted in your chest to or replace a failing heart.

because health skills are tools and strategies and also practical skills are also something you need to learn (like tools and strategies) and put it in reality.