This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
All of the following are true about Graves disease except 
Select and explain. 
A. Cardiac failure is common, B. Hypertrophy and hyperplasia or thyroid gland is due to TSH- Rab, C. Remissions and exacerbations are not infrequent, D. It is highly vascular with audible bruit
C: Remissions and exacerbations are not infrequent
Answer: C: Remissions and exacerbations are not infrequent 
Explanation: None