A 41-year-old woman comes to the physician complaining of excessive fatigue for the last 2 weeks. She states that 1 month ago,

A 41-year-old woman comes to the physician complaining of excessive fatigue for the last 2 weeks. She states that 1 month ago, she had experienced episodes of palpitations and diarrhea, but those symptoms have now resolved. Past medical history is significant for type I diabetes mellitus, which is treated with insulin. She also has been taking a laxative several times a week to help with new-onset constipation, which started 3 weeks ago. Temperature is 36.5°C (97.7°F), pulse is 48/min, blood pressure is 124/88 mm Hg, and BMI is 22 kg/m2. Physical examination shows cold, dry skin and thinning hair on the scalp. Which of the following additional findings is likely present in this patient? Group of answer choices Increased antimicrosomal antibodies titer Decreased antimicrosomal antibodies titer Decreased thyroid stimulating hormone levels Accelerated uptake of radioactive iodine on thyroid scintigraphy Increased TSH-receptor antibodies titer