Why Are Corticosteroids Often Included in the Treatment of Hyperthyroidism

Why are corticosteroids often included in the treatment of hyperthyroidism?

A) To stabilize the erratic blood sugars of hyperthyroidism
B) To increase the catabolism of T₄ to T₃
C) As an antiinflammatory agent for the thyroid
D) To counteract the increased delta-4 steroid reductase activity
E) To displace thyroxine-binding globulin from plasma proteins