A 42-year-old woman comes to the physician because of anxiety, tremor, and a 5-kg (11-lb) weight loss over the past 4 months despite good appetite. Physical examination shows fine thin hair, exophthalmos, goiter, and warm moist skin. Cardiac examination shows tachycardia and a widened pulse pressure. Which of the following sets of laboratory values is most likely in this patient's serum?
A) Low thyroxine (T4), low triiodothyronine (T3), high thyrotropin (TSH)
B) High thyroxine (T4), high triiodothyronine (T3), low thyrotropin (TSH)
C) Low thyroxine (T4), low triiodothyronine (T3), low thyrotropin (TSH)
D) High thyroxine (T4), high triiodothyronine (T3), high thyrotropin (TSH)