Which of the Following Are Considered to Be "Quick Relief $\beta$

Which of the following are considered to be "quick relief" agents in treating asthma?
I.methylxanthines
II.ipratropium
III.systemic corticosteroids (oral or intravenous) IV.short-acting inhaled $\beta$ ₂-agonists
V.long-acting inhaled $\beta$ ₂-agonists
VI.leukotriene antagonists

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