Correct Answer = A.
<p>Inhaled ipatropium bromide, taken on a
     regular rather than PRN basis, should form the cornerstone of
     therapy for patients with COPD.  If monotherapy fails,
     patients should then be tried on inhaled B-agonists. 
     Theophylline should be reserved for patients who remain
     moderately symptomatic despite combined ipatropium and B-
     agonist use.  Oral steroids should be added only as a last
     resort and continued, even as an inhaler, only if objective
     evidence of benefit associated with their use can be
     demonstrated.