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: Pharmacology
All are true about starting of beta-blocker therapy in a patient with congestive heart failure except: 
Select and explain. 
A. They should be started with optimum 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 optimum doses
Answer: A: They should be started with optimum doses 
Explanation: Clinical use of β2 adrenergic receptor antagonists in heart failure

These are now recommended for routine use in patients with an ejection fraction < 35% and NYHA class II or III symptoms in conjunction with ACE inhibitor or angiotensin-receptor antagonist, and diuretics.
These should be initiated at very low doses, generally less than one-tenth of the final target dose.
NYHA Class IIIB and IV patients should be approached with a high level of caution; and in recently decompensated heart failure, beta-blockers should not be used until the patients are stabilized for several days to weeks.