When a Child Presents with Adventitious Breath Sounds, Such as Wheezing

When a child presents with adventitious breath sounds, such as wheezing, coughing, mucous production, and airway hyper-responsiveness, for which of the following reasons would a complete blood count be ordered?

A) To assess for anemia
B) To assess oxygen saturation
C) To assess for infection
D) To assess for the presence of viruses