The calories in food come from carbohydrates, proteins, and fats. A gram of carbohydrate contains 4 calories. A gram of protein also contains 4 calories. A gram of fat, though, contains 9 calories — more than twice the amount of the other two.
I think the correct answer from the choices listed is option B. In order for Tammy to get the most for an effective workout, she should u<span>se the machine to maintain or decrease her intensity. Hope this answers the question. Have a nice day.</span>
