What is the treatment for congestive heart failure in dogs?

Oxygen therapy should be provided through a nasal catheter or free flow.
Diuretics should be administered through an IV catheter at a dose of 4-8 mg/kg every hour.
Sedation should be provided to all patients with congestive heart failure.
Vasodilators such as nitroglycerin or nitroprusside can be used to decrease venous congestion and pulmonary edema.
a) I and II are correct.
b) II and III are correct.
c) III and IV are correct.
d) I and IV are correct.