A 78-year-old woman with no past medical history of note is admitted with palpitations and shortness of breath.. Digoxin

A 78-year-old woman with no past medical history of note is admitted with palpitations and shortness of breath, having been unwell for the past three days. Examination reveals an irregularly irregular pulse of 130 bpm, a third heart sound, blood pressure of 108/70 mmHg, oxygen saturations o f 96% on air and bibasal lung crepitations.
What is the most appropriate therapy to control her heart rate?
A.A Amiodarone
B.A Flecainide
C.A Verapamil
D.A Digoxin***
E.A Bisoprolol.