Regarding Drug Development and Approval,an "Orphan Drug" Is a Drug

Regarding drug development and approval,an "orphan drug" is a drug that is

A) used exclusively in children
B) prescribed for conditions other than those approved by the FDA
C) given special funding for development because it is used in a small patient population with a relatively rare disease
D) available directly to consumers without a prescription
E) only available in countries outside the United States