What is important for our survival and health ? a. saturated and trans fats b. sugar c. calories

The answer would be Calories. This is because your body needs calories for energy. Altho eating to many calories and not burning them off can lead to weight gain. 
-hope this helps :3

20 times a minute is usually the average respritory rate of an adult. additionally the patient is breathing on his own, is clearly maintaining his airway, and is intaking a sufficient amount of air. you shouldn't use a bag valve mask, cpap, or other form of positive pressure ventilation, unless the patient has lost control of his airway, and is not breathing (apneic) or has rapid breathing or slow and shallow respirations. this patient would most likely and should be put on an non-rebreather mask or nrb attached to 100% high flow oxygen at 15 l/min. don't use a nasal cannula, as the amount of oxygen it provides is limited with a rate of 6 l/min.

Trade schools would be the best option