Answer:
C
Step-by-step explanation:
The reason it can not be A, is because high metabolism is when your body burns off calories and such faster than average. Making it easier to maintain and lose weight. So with that explanation D is also out of the question. Now B is kinda on the ball here. metabolism does change with age. But it tends to be it slows as you grow up. This can be seen when you watch a school ager eat. for example my 7 year old brother can eat 6 tacos in one sitting. But he still only weighs 54 pounds. That is due to his high metabolism.