David has been feeling tired lately, and after having blood work completed, it shows elevated TSH, low iodine, and low thyroid hormone levels. Predict the possible cause from the choices below.
A. David may have iodine deficiency that is causing his thyroid to produce too little thyroid hormone.
B. David could have a pituitary gland tumor.
C. David could possibly have a thyroid tumor.
D. Too little information is given to determine the cause.
Answer: A
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