A 65 years old male, known to have atrial fibrillation

A 65 years old male, known to have atrial fibrillation. Came complaining of recurrent attacks of head lightness over the past 3 months. He used to take Digoxin but he had not used it for many years. His
carotid examination was normal. Physical examination was normal apart from tachycardia. What would
you consider to give this patient?
a) Preparation from Digitalis
b) Propranolol
c) Cardiac rehabilitation
d) Cardiac conversion