Which of the Following Is the Best Simplification (Or Easier

Which of the following is the best simplification (or easier to understand) of the endocrine system?

A) Cause (nutrient levels in the blood, excess hormones) and effect (the organs affected: hypothalamus, pituitary, thyroid, parathyroid, adrenal, pancreas, and gonads)
B) Receptors (basic organs like the hypothalamus, pituitary, thyroid, parathyroid, adrenal, pancreas, and gonads) , the information received (hormones) , and the result (what is secreted by the organ once the information is received)
C) Signal senders (endocrine glands: hypothalamus, pituitary, thyroid, parathyroid, adrenal, pancreas, and gonads) , the signals (hormones) , and the signal's outcomes (adjusting levels of nutrients in the blood, assisting the body to respond to its environment, and directing growth and development)
D) None of these are accurate descriptions of the endocrine system