The most common cause of hyperthyroidism is _________. What are three classic s/s of hyperthyroidism?
a) Graves disease; hyperthyroidism, exophthalmos, and pretibial myxedema
b) Hashimoto's thyroiditis; hypothyroidism, goiter, weight gain
c) Thyroid adenoma; hypothyroidism, weight loss, cold intolerance
d) Thyroid carcinoma; hyperthyroidism, weight loss, hoarseness