(A) Answer:- Diagnosis is Addison's disease.
- Addison's disease it is an endocrine disorder that occurs in all
age groups andcharacterized by skin hyperpigmentation,muscle
weakness and fatigue, Weight loss and decreased appetite.
(B) Answer:- Her diagnosis be primary endocrine disorder because
primary adrenal insufficiency is when adrenal glands are damaged
and are not able to make the cortisol hormones.
(C) Answer:- Hyperpigmentation of skin in Addison's disease is
caused by :-
  Â
      Excess adrenocorticotrophic
hormone (ACTH)
                      Â
|| stimulate
      Melanocytes produce melanin
(in skin)
(D)Answer:- treatment of Addison's disease involves taking
hormones to replace the insufficient amounts being made by adrenal
glands.