What Are the Differences Between Spiriva and Atrovent

Multiple Choice

What are the differences between Spiriva and Atrovent?
I. Atrovent has fewer side effects than Spiriva.
II. Atrovent has more side effects than Spiriva.
III. Spiriva is a dry powder and is taken once daily.
IV. Atrovent is taken once daily.

A) I and II only
B) I, II, and III only
C) III only
D) All of the above