What Combination of Drug Therapy Has Significantly Reduced Symptoms and Improved

What Combination of drug therapy has significantly reduced symptoms and improved pulmonary function in patients admitted to the hospital for their asthma exacerbation
I.IV magnesium
II.Inhaled short-acting beta agonists
III.Systemic CortiCosteroids
IV.Inhaled magnesium sulfate

A) I, II, III, and IV
B) II, III, and IV
C) I, III, and IV
D) I, II, and III