A Client with Hypothyroidism Is Told by the Health Care

A client with hypothyroidism is told by the health care provider that the thyroid-stimulating hormone level is elevated.The client 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) "You probably misunderstood your health care provider."
B) "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."
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) "TSH is an incomplete thyroid hormone.Because it cannot bind to tissues,it builds up in the bloodstream."