Your Answer is B - Aerobic exercise is carried out for a sustained period of time.
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Instinct is a natural thing, its hereditary, where as adopted behavior is to do with environment <span />
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If the disease is communicable, it is contagious. If it is airborne, it is transferred through the air, as opposed to physical touch or blood-borne. Being in a confined space, such as an ambulance, with an airborne communicable disease means you have most definitely been exposed to it.
