Which of the following describes the best method for keeping the endocrine system healthy? a. exercise regularly b. eat a healthy and balance diet c. manage stress d. all of the above

answer(d) call 911;

out of the choices i'd say d the ability to set goals, mainly because to desire to continue you need motivation but it isn't motivation in that part, but setting goals means you have an endgame and you want to reach it which sums up motivation.