When Reviewing Code Selection from the Respiratory Subsection of CPT

When reviewing code selection from the Respiratory subsection of CPT, why is it important for a coder to identify the cause of the condition (i.e. a traumatic injury vs. a medical condition) ?

A) Medicare will only reimburse providers for treatment of medical conditions
B) modifier 22 may be appended to codes reporting treatment of a traumatic injury
C) the provider will receive a higher reimbursement rate if treatment is provided for a traumatic injury
D) a traumatic injury is an acute condition and a medical condition is a chronic condition