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: Medicine
All are true about starting of β-blocker therapy in a case of CHF except - 
Select and explain. 
A. They should be started with optimal doses, B. They should be gradually increased over weeks, C. Special precautions should be taken in cases of NYHA class III and IV, D. Carvedilol and Metoprolol are the preferred drugs
A: They should be started with optimal doses
Answer: A: They should be started with optimal doses 
Explanation: None