Visual Disturbances Are a Common Occurrence in Patients with Untreated

Visual disturbances are a common occurrence in patients with untreated Graves disease.The endocrinologist explains to the patient that the main cause of these complications is:

A) decreased blood flow to the eye.
B) orbital edema and protrusion of the eyeball.
C) TSH neurotoxicity to retinal cells.
D) local lactic acidosis.