A 30-year-old woman reports to the clinic for a routine physical examination. The examination…

A 30-year-old woman reports to the
clinic for a routine physical examination. The examination reveals she is
pregnant. Her plasma levels of TSH are high, but her total thyroid hormone
concentration is normal. Which of the following best reflects the patient’s
clinical state?

 A) Graves’ disease B) Hashimoto’s
disease C) A pituitary tumor secreting TSH D) A hypothalamic tumor secreting
thyrotropinreleasing hormone (TRH) E) The patient is taking thyroid extract