A Nurse Is Caring for a Patient Newly Diagnosed with Hypothyroidism.The

A nurse is caring for a patient newly diagnosed with hypothyroidism.The patient's doctor informed the patient about her thyroid-related lab work.Later, the patient says to the nurse, "I don't understand why my TSH is high.I thought I had low thyroid levels." The most appropriate response by the nurse is:

A) "TSH is a hormone released by the pituitary that signals your thyroid to make hormones.When the thyroid can't respond, the pituitary keeps trying to send its signal, and the TSH keeps going up."
B) "TSH is an incomplete thyroid hormone.Because it cannot bind to tissues, it builds up in the bloodstream."
C) "TSH is not thyroid hormone.When thyroid values are low, other lab tests are performed to see how you tolerate the low levels.
D) "You probably misunderstood the physician.Your TSH is low because your doctor spoke with you about hypothyroidism.