Refer to the Figure Showing the Thyroid Gland

Refer to the figure showing the thyroid gland. Based on the figure, what can you conclude about the synthesis of thyroxine?

A) Epithelial cells of the thyroid gland synthesize thyroglobulin from tyrosine and iodine within the epithelial cells of the thyroid gland.
B) Iodine is added to tyrosine within the lysosome of the thyroid epithelial cell.
C) Thyroxine is secreted into the follicular lumen of the thyroid gland.
D) When thyroxine is secreted, it consists of three molecules of tyrosine and three to four molecules of iodine.
E) Epithelial cells of the thyroid gland use lysosomal enzymes to digest iodinated thyroglobulin into two different forms of thyroxine.