A 35-year-old woman presents with lethargy, weight gain and cold intolerance. TSH is 18 mIU/L and free T4 is low. She has no cardiac disease and is not pregnant. What is the most appropriate initial dosing strategy for levothyroxine?AStart 25 micrograms daily and increase by 25 micrograms every 6 monthsBStart 50 micrograms daily and maintain this dose long termCStart 1.6 micrograms/kg/day (approximately 100 micrograms daily) and titrate according to TSHDStart 200 micrograms daily for 1 week then reduceEDo not start treatment until TSH exceeds 30 mIU/LCheck my answer