Answer:
Keep the air moist, drink water, don't
lie on your back, cough some out if you need to, try some steam, use warm salt water and gargle, take a shower, if it's really bad use medication.
Without a professional to help you develop the correct techniques, you will most likely hurt yourself. You may not even get the right results if you don't learn how to properly use the equipment.
The answer would be d.eating nutritious meals
Cardi is a root word and Cardi/o is a combing form. They are NOT prefixes. Anyhow Cardi means heart always.
Such as in the word Cardiovascular
Cardi/o-heart
Vascular-bloo vessels
Ar-Pertaining to
Add it up and you get
Pertaining to the blood vessels of the heart.
The answer is obviously A
