From experience with my best friend, I´d say C.
Carbohydrates changed into sugar
proteins broken down to amino acids
fats converted to fatty acids
nutrients carried to cells
I think C. Hopefully I helped, health is not really my forte
The endocrine system is one the system in the human body that regulates all the hormones which aids in the normal functioning of the other systems. Therefore, the major functions of the endocrine system include metabolism, and puberty body. Hope this answers your question.
Eating well, exercise, sleep, drinking water, avoiding harmful habits , don’t get sick constantly